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If you have a slot machine or you have bought one old used vintage slot machine and want to have some fixes to get it work then obviously you will think you need a machine technician. Many of you will even think of taking it to some repair station to get things done. But here in the guide you will find some of the repairs that you yourself can do with your slot machine and you need not need to join machine technical repair training school.

Like any other machines Slot machines too are a blend of electronic and mechanical components, that wear with age and require routine repairs. Before you begin to repair yourself do note that every slot machine that you have purchased whether old or new comes with installation and user guide manual. You need to read that many a times until you are familiar with each components and parts of the slot machine and understand thoroughly as how the slot machine works.

In your guide to repair slot machines you will find some common repairs that can be carried out by you, some videos to watch as well. If your slot machine has some complex issue then obviously you require a qualified technician.

Changing the Top Florescent Light

The top florescent light bulb is easily changed by following these simple procedures. The replacement bulb is an F15T8/CW 18″ 15 Watt bulb which is available at most hardware and department stores or may be purchased online at Ebay or Amazon or realslotmachinesforsale under the category ‘parts of slot machine’.

• Open the main slot machine door and ensure the door is fully open. Turn off the power to the slot machine. The power switch can be found with the main door open about midway down on the right side just inside the machine.
• If the machine is equipped with a top ticket printer, you must pull the bottom of the printer out far enough to see where the ticket paper is located, and note the area large enough to place a couple of your left fingers under.

• Remove the top metal trim strip which is a cover plate to the right of the ticket printer and/or is located along the bottom of the top glass. There are a couple of clips on the back of the metal trim strip that fit into notches on metal bracket which holds the top glass. The metal trim strip should be lifted upwards and outwards to remove.
• Once the metal trim strip is removed, the next step is to remove the top glass. Note that some top metal trim strips have a slot in the top that holds the top glass and they must be removed very carefully as to not damage or drop the top glass.

• You can now see the top glass is held in place by usually two or three clips that rise above the metal bracket behind the top metal trim strip. Now slowly lift up on the top glass from both bottom edges until the top glass until it is high enough to gently pull it forward and allowing it to slide down and away from the top track and clips holding it in place.
• Once the top glass has been removed, put it somewhere where it will not get knocked over or broken. You will see the florescent bulb in the middle of the top box area of the machine. Care should be taken removing the bulb as it may be very hot. Remove the old bulb by twisting the florescent tube about a quarter to half turn allowing the two prongs on the bulb to slide out of the fixture on both sides of the bulb.

• Remove and discard the old bulb. To install the new bulb, align the two prongs on each side of the florescent tube with the slits on each fixture in the top box of the slot machine. Twist the bulb into place normally using about a quarter to half of a turn. If the bulb is not secure or aligned, repeat the procedure.
• If your slot machine is an IGT S Plus machine, it is equipped with a florescent bulb starter. Then you can replace the starter when replacing the florescent light bulb. The starter is an FS-U Universal Starter. They are available at most hardware and department stores or may be ordered online too. The starter for the top florescent bulb on an IGT S Plus machine is located directly behind the florescent bulb fixture on the left side of the slot machine in the top box area.
• It is replaced by twisting about a quarter to half a turn as it is held in place with a bayonet type mount. Remove the old starter and discard. Replace with a new FS-U Universal Starter by aligning the two pins on the bottom of the starter with the notches in the starter receptacle, pushing it up into the starter socket, and then twisting it a quarter to half a turn into place.
• Prior to re-installing the top glass, turn the power switch on the right inside of the machine on to verify the bulb works properly. If it does not, turn the power off and check that the bulb is properly installed and secure. If replacing a starter, check that it is also properly installed and secure.
• After verifying the bulb is working, it is now time to replace the top glass. If your slot machine has a top ticket printer, ensure the ticket printer is still pulled out so you can place your fingers in the opening while replacing the top glass.
• Carefully and slowly lift up the top glass placing each hand under the bottom of the top glass. Slide it into the upper edge track on the top box of the slot machine carefully lifting it so it slides into the tracks while being able to push the top glass back far enough to clear the two or three raised clips on the metal bracket where the top glass holding track is located.
• Gently and slowly lower the top glass behind the clips so as to allow them to hold the glass in place. If properly secured, the top glass will not be able to slide down or out of its position. Keep a secure hold on the top glass until you are certain it is secured in the proper position.
• Replace the top metal trim strip by aligning the two or three hooks the back through the metal bracket that supports and holds the top glass. Once the hooks on the back are in place, gently push the top metal trim strip down and it should snap into place. If you have a slot machine with a top ticket printer, close it tight into position. Close the main slot machine door and you are ready to play.

Changing the Belly Glass Florescent Light

The belly glass florescent light bulb is easily changed by following these simple procedures. The replacement bulb is an F15T8/CW 18″ 15 Watt bulb which is available at most hardware and department stores or may be bought online as spare parts of slot machine.

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• Open the main slot machine door. Turn off the power to the slot machine. The power switch can be found with the main door open about midway down on the right side just inside the machine.
• Facing the slot machine door, look on the right side of the door just around from bill acceptor area. You will see a knob sticking out that is approximately the size of the end of a regular pencil. This knob when pulled out releases the slot machine belly glass assembly (belly door) to fold down so the bulb can be accessed.

• There are a couple of very important thing to remember prior to pulling this knob to release the belly door. First try pulling gently on the knob. If it does not allow you to pull out and you have a lock installed directly above it, the lock must unlocked in order to allow the release knob to pull out. When pulling out the release knob, be ready for the belly door to fold down.
• Most of the time you must lightly pull on both sides of the belly door to get it to fold down, however always place your hand under it so it does not fall down too quickly causing the belly glass to break or crack.
• Once the belly door is in the down position, you will see the access to the florescent bulb bracket that is held in place by a small Phillips screw. Remove the screw and place it the coin tray so it will be handy when you need it after replacing the bulb.

• The long metal bracket that holds the florescent bulb must be slid slightly right or left so as to be able to lift it out of the belly door. Gently lift the metal bracket with florescent bulb out of the assembly far to be able to turn it over to replace the bulb. Be cautious as the bulb could still be hot!
• Grasp the metal bracket holding the florescent bulb and remove the old bulb by twisting the florescent tube about a quarter to half turn allowing the two prongs on the bulb to slide out of the fixture on both sides of the bulb.

• Remove and discard the old bulb.To install the new bulb, align the two prongs on each side of the florescent tube with the slits on each fixture that is on each side of the new bulb. Twist the bulb into place normally using about a quarter to half of a turn. If the bulb is not secure or aligned, repeat the procedure.
• Now turn the metal bracket that holds the newly installed bulb over and back into position in the belly glass assembly. Slid the bracket slightly right or left into position and replace the small screw which holds the metal bracket in place.
• If your slot machine is an IGT S Plus machine, it is equipped with a florescent bulb starter. So you need to replace the starter a well when replacing the florescent light bulb. The starter is an FS-U Universal Starter. They are available online and you can purchase one.
• The starter for the belly glass florescent bulb is located on the back of the main slot machine door on the lower right hand corner as you face the back of the door.

• It is replaced by twisting about a quarter to half a turn as it is held in place with a bayonet type mount. Remove the old starter and discard. Replace with a new FS-U Universal Starter by aligned the two notches on the bottom of the starter, pushing it into the starter socket, and then twisting it a quarter to half a turn into place.
• Prior to closing the belly glass door, turn the power switch on the right inside of the machine on to verify the bulb works properly. If it does not, turn the power off and check that the bulb is properly installed and secure. Also check to ensure the starter is properly installed and secured.
• Lift the belly glass assembly up and push it into place in the slot machine door. Ensure the belly glass door snaps into place and the knob on the side of the door is in its normal position. It is spring loaded so as to not allow the belly glass assembly to open unless it pulled. If the belly door appears to be in place, pull on both sides of the belly door to make sure it is locked and secure.
• If you unlocked the lock above the knob, re-lock it. Close the main slot machine door and you are ready to use your slot machine.

Changing the Push Button Bulbs

All of the slot machine’s push button lights such Play Max Credits, Spin Reels, Bet One Credit, etc. are easily replaced by following this simple procedure. The replacement bulbs are #161 on IGT S2000 machines and #555 on IGT S+ machines and may be purchased from online stores.

• Fully open the slot machine door. Look on the backside of the door. Each push button will extend down from the shelf on the door and will have a small wire bundle going to it. Identify which push button bulb needs to be replaced.
• Carefully pull down on the bottom of the push button area that is normally white and is where you will see wiring connected. Using your thumb and two fingers, pull straight down and the bottom portion of the push button should snap out.

• You will now be able to see the bulb in the top area of the lower push button assembly. Use caution as the bulb may be very hot. Pull the wedge bulb out and discard it. Notice the slot in which the bulb located.
• Place a new bulb in the slot noting the direction of slot ensuring the new wedge bulb is inserted so as to line up in the slot. Push the new bulb into place.

• Replace the bottom of the push button assembly by inserting it into the top portion of the push button assembly. The bottom portion will snap into position. Ensure that none of the wire connections have been accidentally knocked loose on the bottom of the push button. Note the push button light will not illuminate until the slot machine door is closed. Close the main slot machine door and you are ready to play.

Changing the Small Panel Lights

The small panel lights that illuminate the denomination amount and other areas behind the glass are easily changed. For denomination amount lights on the IGT S2000, a #73 bulb is needed and a #86 bulb is needed on the IGT S+ slot machines. They may be bought online from slot machine selling sites.

Here it is described as how to change the lights behind denomination amounts such as .25 Cents. Other small panel light bulbs are changed in the same manner.

• Fully open the slot machine door. Look on the backside of the door. Note the location where the denomination amount would be located near the center just below the slot machine’s center glass. The area will appear to be flat with a small bulb holder projecting out that is slightly larger in diameter than a regular pencil and is flat on two or four sides.

• This bulb holder is removed by simply twisting it a quarter to half a turn and then gently pulling it out of its socket. It is held in place by somewhat of a bayonet type mount.
• Once the bulb holder is removed, pull the wedge bulb out of the socket and discard the old bulb. Caution should be taken as the old bulb may be very hot. Replace the bulb by firmly inserting a new bulb into the socket of the bulb holder being careful to align the wedge bulb correctly into the slot.
• Take the bulb holder and look for two notches on each side of the opening where the bulb holder is inserted. Note there are two notches on the bulb holder. Align the notches inserting the bulb holder into the panel.
• Gently twist the bulb holder about a quarter to half a turn to lock it into place. Verify the bulb is illuminating, and if not repeat the procedure using a different new bulb. Now close the main slot machine door and ready to use.

Cleaning Your Slot Machine

This is common thing and all you need is usually nothing more than a damp cloth to clean the exterior cabinet of your slot machine. Never use any abrasive or ammonia based cleaners on the cabinet of the machine.

The slot machine top, center and belly glasses may all be cleaned on the outside by using a window cleaner. However if you own a slot machine with a frosted exterior glass or one that has any exterior decorated markings such as stars, a window cleaner should not be used as the cleaner may damage the exterior images. Care should be taken cleaning interior glass as a cleaner and cloth may damage labels or markings.

The inside of the slot machine should not require cleaning other than occasionally removing dust. This can normally be done with a damp clean cloth, however ensure the power switch has been turned off prior to cleaning.

When wiping dust inside your machine, be careful not to loosen any wires or connections. Do not use a damp cloth on the face of your reel strips as the playing symbols on the reel strips could come off or become torn. Also be very careful not to touch the back side of your reel strips with a damp cloth especially if the back sides of the reel strips are black. This can cause damage to this type reel strip.

When your Slot Machine Doesn’t Power On

When you get a slot machine and wish to locate or set up at your place, determine the household 120V AC outlet you are planning to use has power. Keep in mind some outlets are controlled on and off by a wall switch.

• With the slot machine unplugged from the outlet and surge protector, open the slot machine main door. Remove the coin tray by lifting up and pulling out the tray. Simply pull it out and down to remove the tray.

• The hopper is on the bottom floor of the machine and slides out on two base rails along two metal guides. Slide the hopper out slowly by grasping the handle with your left hand and supporting the hopper with your right hand. Do not use the black hopper bowl to pull the hopper out of the slot machine.
• On the lower right corner of the slot machine you should see the black power cord coming into the machine. The power cord plugs into the Power Distribution Unit which is located on the back wall of the slot machine.
• Verify the power cord is firmly plugged into place into the right side of the Power Distribution Unit.

• Place the hopper back into the slot machine making sure it slides in easily and completely with the base rails on hopper guides on the bottom of the machine. The hopper plugs into a receptacle toward the back of the machine. It is designed to fit in easily without using excessive force.
• The coin tray can be easily put back into place by ensuring the alignment pins on the coin tray match up to the top alignment holes on the bottom side of the machine. The tray should be pushed down into place. Make sure the tray is even when pushed into place. If the coin tray is not aligned and even, remove the coin tray, and repeat the procedure.
• Verify the power cord is firmly plugged into a good surge protector. Plug the end of surge protector into the outlet you have verified is good, and make sure the on/off switch on the surge protector is turned on.
• Now turn the power switch on the inside right of the slot machine to the on position and verify the slot machine is powered on by lights illuminating.

Jackpot Payout Reset

When your slot machine just hit a 25,000 credit Jackpot it now needs to be reset to continue playing. Depending on the model slot machine you have and the amount of the payout will determine the best course of action.

If you have an IGT S+ Slot Machine and your win is under the maximum payout amount specified on the center glass of the machine, the hopper may run out of coins or tokens. This is normally displayed by Error Code 3300. In this case it usually a simple matter of taking the coins or tokens that have been paid out and putting them back in the hopper allowing it to fully pay out. However, if you won a large jackpot that is “hand pay out”, then follow the steps below.

• First open the main slot machine door. Locate the Jackpot Key which is normally kept inside the slot machine in a plastic envelope on the side of the cash box. If you do not find it inside the machine, often times the Jackpot Key will be strapped with the main slot machine door key. It is a small key as pictured below.
• Take the key in hand and locate the jackpot reset which is a keyhole located on the right side of the slot machine. It is normally about two-thirds up from the bottom of the machine.

• Insert the Jackpot Reset Key into the keyhole. Turn the key only one quarter turn to the right. This will reset the machine, and once you close the main slot machine door, you will be ready to resume play.
• Note that if you turn the Jackpot reset key multiple times you may place your slot machine into a test mode and will thus delay your ability to continue playing.

Some of the Error Codes you get on Slot Machine

Error Code 3300 (IGT S+ Machines)

Simply put Error Code 3300 is normally telling you your hopper is low on or completely out of coins or tokens.

Open the main slot machine door. Look into the hopper. If it is empty or has just a few coins or tokens, place about 500 coins or tokens back into the hopper. Close the main slot machine door. In a few moments you should hear the sound of the hopper’s motor turning and soon the remaining coin payout will begin.

Error Code 3100 (IGT S+ Machines)

Error Code 3100 (Extra Coin Out Tilt) normally signifies either a jammed/stuck coin or token in the coin-out chute on the hopper, or the hopper coin-out sensor has detected the hopper may have paid out an extra coin.

• Open the main slot machine door. Remove the coin tray by lifting up and pulling out the tray. Simply pull it out and down to remove the tray.
• The hopper is on the bottom floor of the machine and slides out on two base rails along two metal guides. Slide the hopper out slowly by grasping the handle with your left hand and supporting the hopper with your right hand. Do not use the black hopper bowl to pull the hopper out of the slot machine.
• Inspect the hopper to determine if any coins/tokens appear to stuck or jammed in the hopper knife or the hopper coin-out channel.
• If a coin appears to be stuck or jammed, empty the hopper of coins/tokens for easier access to clearing the jammed coin/token.
• Once the stuck or jammed coin has been removed, place the hopper back into the slot machine making sure it slides in easily and completely with the base rails on hopper guides on the bottom of the machine. The hopper plugs into a receptacle toward the back of the machine. It is designed to fit in easily without using excessive force
• Refill the hopper with the proper size coins or tokens. The coin tray can be easily put back into place by ensuring the alignment pins on the coin tray match up to the top alignment holes on the bottom side of the machine. The tray should be pushed down into place. Make sure the tray is even when pushed into place. If the coin tray is not aligned and even, remove the coin tray, and repeat the procedure.
• Close the main slot machine door. The error code should be gone and the machine is ready to play.

Error Code 12 (IGT S+ Machines)

The 3.6 volt battery on the slot machine CPU Board normally lasts for years. However when an Error Code 12 is displayed, this is an indication the battery voltage has dropped below 2.9 volts and is now a low battery.

It is recommended to replace the battery as soon as possible. They can be purchased online from ebay, amazon or realslotmachinesforsale. When ordering a replacement battery, they will provide you with detailed instructions on how to change this battery which is located on the slot machine’s CPU Board.

In order to reset Error Code 12 temporarily, simply open and close the main slot machine door. It is important not to wait for a long time to replace the battery as data stored on the RAM may be lost. Replace the battery Asap.

Following are some of the other error codes that might interest you to solve your problem in repairing the slot machine

CODE	DESCRIPTION	PROBLEM
12	Low Battery	Battery voltage on processor board has dropped below 2.9 volts DC
21	Coin-In Tilt	Optic coin-in sensors were blocked
3100	Extra Coin Out	Stuck/jammed coin in hopper or optic sensor detects extra coin paid
3200	Coin-Out Tilt	Hopper coin-out sensor was blocked
3300	Hopper Empty	Hopper coin-out sensor sensor detects no coins were dispensed for 8 seconds or more. Hopper needs to be refilled with coins/tokens.
41	Reel #1	Tilt Designated reel is misaligned or malfunctioning
42	Reel # 2 Tilt	Designated reel is misaligned or malfunctioning
43	Reel #3	Tilt Designated reel is misaligned or malfunctioning
44	Reel #4	Tilt Designated reel is misaligned or malfunctioning
45	Reel #5 Tilt	Designated reel is misaligned or malfunctioning
49	Reel Mechanism Disconnected	A reel mechanism has become unplugged or the circuit is interrupted
61	CMOS RAM	Bad CMOS RAM data or data was cleared
62-0	Bad Game EPROM	Game program or data program check
62-1	Bad Data EPROM	Bad EPROM data
63	Processor Tray Open	Main processor door has been opened and closed since last game played
65-0	Bad EEPROM Device	Processor could not successfully read from or write to chip
65-1	Bad EEPROM Data	Data is invalid or corrupted
65-2	Game Type Mismatch	Game data om CMOS RAM does not match game data in EEPROM
66	Game EPROM Changed	Machine senses the game EPROM has been changed
67	Data EPROM Changed	Machine senses the data EPROM has been changed
68	Non-Compatible Data EPROM	Data EPROM is not a standard file
99-1	Bill Validator	Stacker jam
99-2	Bill Validator	Cash box removed
99-4	Bill Validator	Cash box full
99-5	Bill Validator	Hardware error
99-6	Bill Validator	Reverse bill detected

Hopper is Full and Coins Go Down a Chute to Bottom of Machine

Slot machines that accept coins were designed this way because when used constantly on the casino floor, hoppers could quickly fill. There is a coin level probe on side of the hopper that looks like a brass screw sticking inward toward the hopper bowl. This probe detects when coins/tokens are at a selected level, and will cause the subsequent coins/tokens played to go down a chute to the bottom of the slot machine.

Provided your slot machine sets on a regular casino slot machine stand with holes in the top and the holes are aligned with the slot machine, those coins which bypassed the hopper will go down the chute, through the hole in the bottom of the machine, through the hole in the top of the stand, and into the open area in the stand cabinet. As casinos have done for years, place a small plastic tub in the slot machine stand cabinet to collect these excess coins.

Retrieving Currency from the Cash Box

Though not all slot machines are equipped to accept currency in order to comply with certain laws but if your slot machine is equipped with a bill acceptor, bill transport and cash box, the bills in the cash box can easily be retrieved.

• Open the slot machine main door. The cash box door is located just under the yellow chute for the bill acceptor. Ensure the cash box door is fully open.
• On the right side of the cash box toward the top is a release level. Push release lever down and pull the cash box straight out toward you. If the cash box seems difficult or impossible to pull out, make sure you have pushed the release lever down.

• Hold the cash box in both hands and turn it upside down. Notice on the bottom of the cash box is a door which has two small finger sized holes on one side. Normally the door is held closed by a small piece of electrical tape so the bottom cash box door doesn’t come open while removing it from the cash box chassis of the slot machine.
• While holding the cash box with the bottom door up toward you, open the door and you will see where the bills are stored. The large spring expands as more and more bills are added to the cash box. Remove the bills by pulling them straight out.
• Close the bottom door of the cash box and re-secure the door using the same small piece of electrical tape. Turn the cash box around to the original position when you removed it from the slot machine.
• Align the flat top of the cash box with the flat surface at the top of the cash box chassis from which you removed it. Slide it firmly into place. Now close the cash box door and the main slot machine door and you are ready to use it for gaming.

All the content, graphics and videos in this post have been gathered by research for you from various online sources and hope this helps you as a guide to repair your slot machines. Note that many guide books and manuals too are there for you to buy from online stores which are handy to know as how to repair your slot machines. Just stay tuned at realslotmachinesforsale and know many more interesting information about slot machines.

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There's a lot to take in and discover when playing Borderlands 3, and even returning fans may not realize several key elements to the game that aren't explicitly told to you. We've rounded up several noteworthy mechanics and elements to Borderlands 3 that the game doesn't outright tell you, which you can view below.
Other Borderlands 3 Guides:

• Borderlands 3 Shift Codes!
• Easter Eggs and References.
• How to Respec Your Character and Costs Explained.

Some Useful Tips and Tricks

How to Unlock Weapon and Item Slots
When you start Borderlands 3, you'll only be able to swap between two equipped weapons, and will only have access to a grenade and shield - so when does everything else unlock? Over the course of the game you'll eventually get two more weapon slots, as well as Class Mods and Artifacts to equip as well. Depending on how fast your moving through areas, you may even start finding items you cant even equip yet.
These unlocks are tied to completing story quests, so here's when you can expect to unlock them.

• Your Third Weapon Slot will unlock after leaving Pandora for the first time, completing the Taking Flight and Sanctuary quests at are your 4th and 5th main missions.
• Your Class Mod Slot will unlock after helping Rhys out on Promethea and defeating the boss and completing the quest Hostile Takeover, which is your 6th main mission.
• Your Fourth Weapon Slot will unlock after completing the first vault mission in the main story, Beneath the Meridian, which is the 10th main mission.
• Finally, your slot for Artifacts will only unlock after taking on another Vault quest called Cold as the Grave, which is the 16th main mission.

Regions are (Mostly) Level-Locked
As you journey across the stars in Borderlands, you'll find out pretty early on that enemies will stick a certain level range when entering new areas and taking on missions. This means that - for the most part - if you pass on a side mission and go back later, you'll likely find both the difficulty and rewards well below your level.
Similarly, if you dash on ahead through main missions as fast as you can, you may start encountering enemies well above your own level, and all the loot they drop may also be unavailable to equip until you can catch up, which can really suck!
Because of this, it's worth your while to stop and smell the flowers - and by that we mean take on side missions, scope out challenges, and generally explore and do whatever you can before moving onto the next area. Certain side missions will appear in areas before or after completing a main mission in that area, so be sure to look around and make sure you don't miss anything.
However, once you reach certain story beats that may return you to past areas, and when you beat the game, enemies in older zones will sometimes increase in difficulty to a certain point. Beyond this, enabling Mayhem Mode once you beat the game will automatically bring all enemies up to level 50 to increase threat and rewards.
Loot the Best Chests ASAP (Or Wait for Mayhem)
These chests will either have the best loot, or the worst loot depending on when you find them.
With regards to level-locked regions, it's very important to note that both Red Chests (usually found after bosses or as bonus unlocked areas from side missions) as well as Typhon Dead Drops (crew challenges triangulated from finding recordings) are also locked to the region of that area (unless a region eventually upgrades over the course of the story).
For that reason you should always be exploring and looting chests in every region as you progress - as saving them for later will only lower the value of what's inside 5 levels later.
However, Mayhem Mode changes this, as it will bring all the chests up to your level along with all other loot and enemies in the region. With Red Chests, you can re-open them each time you quit the game and start anew, while Typhon Dead Drops can only be looted once - so make sure you think hard about when you want to open these. If you miss your chance to get the best loot for your level, come back once you've beaten the game to unlock the other dead drops with Mayhem Mode enabled.
Class Mods Can Boost Locked Skills
Fake it 'til you make it.
Once you start finding Class Mods on Promethea and beyond, you'll notice that they will grant extra points in each of your three skill trees. The better the quality, the more skill points they'll add to more skills.
It's worth noting two things: A Class Mod can further enhance a skill that you've already maxed on the skill tree, which means you can boost the rate of damage or cooldowns and such beyond normal levels.
Secondly, even if you haven't unlocked a skill yet, you don't need to have a point in a skill for a Class Mod to give you that skills effects! Knowing this, you can essentially look for Class Mods to bolster skills in a tree you aren't focusing on to give you an edge in multiple areas at once.
Where Are The Challenges?
Challenge Unlocked - You Found the Challenge Tab
The menus of Borderlands can be.. difficult to navigate at times. Guardian Ranks have their own slot in your ECHO menu, and you can't even check them out until you beat the game. They also take the place of where Challenges were in Borderlands 2 - but that doesn't mean they are gone.
You may start noticing as you play that you'll get notifications that challenges have been met, but they don't appear to be tracked anywhere. If you look at your map, the Challenges Tab only tracks 'Crew Challenges' which are side objectives to uncover in each area.
As it happens, the regular Challenges are hiding deep in the map menu. Hit the Orbit View until you are in the galaxy view of the map, and then click on the Challenges tab. Instead of Crew Challenges, you'll finally see the Challenges you can unlock for killing certain types of enemies, with different weapons, or looting certain items.
Unlike Borderlands 2, Challenges in this game do not unlock bonus stats. Instead, you'll get extra Eridium for each challenge met. Rank 1 will award 1 Eridium, Rank 2 will give 2, and so on until the challenge ranks are all met. Be sure to check your Challenges from time to time to unlock more Eridium, and use it to unlock exclusive rewards from Earl aboard the Sanctuary.
When Can You Mine Eridium?

These purple rocks can be easy to miss.
As you explore Pandora an other planets, you'll likely come across purple rocky mounds that look suspicously like Eridium - but hitting them with your melee attacks proves fruitless, at least for now.
It won't be until much later in the game - you need to complete the 10th Mission: Beneath the Meridian - that you gain the ability to harvest Eridium Ore from the ground wherever you may find it, which can be extremely useful for amassing an Eridium horde. All you need to do once the upgrade is obtained is smash the purple rocks with melee attacks.
Aside from that, your best ways of finding more Eridium are killing (obviously), and taking a spin on the Slot Machines for small Edirium payouts. You can then use the Eridium to either take your chances on the Vault Line Slot Machine, or go see Earl at the bottom of the Sanctuary spaceship to buy special cosmetics and weapons in exchange for the currency.
Respec to Become a New You
Respecing your Skill Tree is easy when you're broke!
Once you've gotten at least one skill point, and decide that skill you've invested in is complete trash - seek out a Quick Change Station, located at the entrance of most regions and in the Sanctuary Ship.
Here you can not only swap out costumes and skins (as well as renaming both your character and FL4K's pets), but you can also reset all of your skill points to try building out a new style.
Of course, nothing is free in life - being able to respecialize your skills will cost a portion of your total money currently accumulated. A character with 29 thousand on hand will only have to pay just under 3 thousand to respect, while someone with 159k in their pocket will have to shell out 15k for a respec. It's a bit like dying - you always have to pay a portion to get what you want.
You've Got Mail
Please don't try to mail rocket launchers in real life.
It's easy to miss, but at certain points in the game, you may get a notification that you've received mail. Wait, what? Mailboxes in the game only have ammo in them, so where do you check your personal mail?
Head to the options screen and look for the Social tab among the Options/Play/Quit. It's here that you can skim through the different areas of the Social Menu to select your Mail, and obtain rewards given out by various NPCs in the game. Different gun manufacturers may give out presents when you've killed enough enemies with their weapons, and other characters may reward you with items as well when you achieve certain goals.
It's important to note that because the Mail is in the Social Tab - it's not tied to any one character - you'll be able to accept the gifts on any character you're playing as, even if they didn't do all the groundwork to get the gift in the mail. Note that the reward you receive from these in-game characters will be tied to the level you were when you unlocked the mail reward.
However, for those who have purchased a Special Edition of the game, you will also be able to redeem special unlocks and even Legendary Gear from your mail section. Legendary Rewards redeemed from the Special Edition will be tied to the level you are when you accept the gift - you may want to wait until you are a higher level to get gear that won't be quickly discarded.
Important: This is also the location where you will redeem all Golden Keys gained from entering Shift Codes in the SHiFT tab of the social options. They will not appear in your inventory until they are redeemed through mail.
If you've got a list of friends also playing, you can even send weapons you've found to them via the mail, in case you scored a really good class mod when playing on your own that your friend might want.
A Weapon to Surpass Legendary?
6 million dollars and counting spent on slot machines - but still no row of hearts.
While Legendary Weapons are among the best you can get - they might not be the absolute best.
We haven't yet found this elusive tier, you may notice that one of the slot machines in Moxxxi's Bar has a payout for a 'red tier' weapon, which is above the payout for the 'orange tier' legendary weapon.
It is not yet known if these elusive red-tier weapons appear in the wild, or if they can only be obtained from the Slot Machines (or if the payout is actually a lie and you can't even get it anyways), but be sure to keep a lookout - and try not to spend all your money gambling!
The Mystery of Red Text
Though it doesn't list it - each shot fired from the Peacemonger will split into four explosive rounds that hurtle in different directions.
When you begin recieving quest rewards and finding uncommon or better loot in the world, chances are you'll notice many of these items will feature red flavor text in the gun's stats. These range from jokes to quotes to very strange words, but they do have meaning.
Like previous Borderlands games, the Red Text is usually a hint at the hidden nature of a weapon - especially for Legendary Weapons. Sometimes the ability is straightforward - like being able to see bullets explode into smaller pieces or follow a strange trajectory. Other times the abilities may be much harder to decipher - so play around with weapon that feature red text to figure out what features a weapon or item may be hiding.
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