TI-84 Plus Silver Edition Motherboard and Screen Replacement (2024)

Introduction

If nothing is working at all on your calculator and nothing you have tried has worked, you may need to replace the motherboard. If the screen is cracked or damaged, you will need to replace it. This guide will show you how to replace both the motherboard and the screen, because they are attached and cannot be easily separated.

What you need

Step 1 Faceplate

Insert your index finger in the open slot below the keys.
Be careful to not bend the plate too much because it is very thin and might break.
Apply a firm upward force until the bottom two tabs located near the bottom of the plate come off.

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Step 2

Grab the face plate on each side near the middle and apply a gentle upward force on each side until the middle tabs come off.
A tab is located in the center of the face plate. If it is still attached, then continue to apply a gentle upward force until the center tab comes off.
Lift the face plate upward until the top three tabs come off and the face plate is completely detached.

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Step 3 Main Battery

Push firmly down on the tab located on the back of the calculator near the center.
Pull the tab up, lifting it off of the calculator and exposing the batteries.

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Step 4

Removing the AAAs and the back up battery will clear the calculator's memory. Make sure you have backed up any important data prior to performing this step.
Push the positive (+) side of the batteries to remove them

Step 5 Backup Battery

Using the Phillips #00 Screwdriver, unscrew the 15 mm screw holding the backup battery cover, located above the main battery area.

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Step 6

Grab the plate and lift gently upward, to remove the backup battery cover.

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Step 7

Wedge the small plastic opening tool under the backup battery in the gap to the left of the backup battery.
The backup battery is an SR44SW coin cell battery. You can also replace it with a size 357/303 or LR44 battery.
Push gently downward until the backup battery pops out.

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Step 8 Motherboard and Screen

Unscrew the six 8.5 mm screws located on the perimeter of the back cover using the Precision T6 Torx Screwdriver.

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Step 9

Wedge the large plastic opening tool in the gap at the bottom between the top and bottom covers.
Apply a gentle downward force to separate the top cover from the bottom cover.
Wedge the large plastic opening tool in the gaps along each side to unhook the side clips.
There are clips located at the bottom of the calculator, on the sides of the calculator (both near the bottom and near the top), and at the top of the calculator.
Pull the bottom cover apart from the top cover.

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Step 10

Unscrew the two 5 mm screws at the bottom of the silver sheet using the Phillips #00 Screwdriver.
Pull up on the silver sheet from the top to remove it from the calculator.

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Step 11

Unscrew the four 5 mm screws on the sides of the mother board Phillips #00 Screwdriver.
Pry the motherboard out from the bottom of the front casing using the large plastic opening tool.

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Almost done!

To reassemble your device, follow these instructions in reverse order.

Conclusion

To reassemble your device, follow these instructions in reverse order.

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Kale McKinney

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Cal Poly, Team 11-34, Amido Fall 2013 Member of Cal Poly, Team 11-34, Amido Fall 2013

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5 Comments

Where can I buy the screen/motherboard?

Tim van Steen - Oct 14, 2015 Reply

Did you find out where to purchase the screen/motherboard? Having trouble finding it online.

Thanks.

Jacqueline Kennedy - Jan 20, 2016

any update on where to fin a motherboard/screen? i found a youtube video which showed how to replace the screen flex, by soldering on new wires, and have read that the only way to get parts is from another calculator, can anyone confirm this?

https://www.youtube.com/watch?v=aIlR0Lpe...

Connor Murphy - Nov 2, 2016 Reply

Yeah - I can't find one to buy either. Your instructions look great though.

juxtapaused - Mar 9, 2017 Reply

I don’t believe you can buy the motherboard anywhere. However you can salvage them out of other damaged calculators.

TheLastMillennial - Aug 12, 2018 Reply