Texas Instruments TI-83 Plus Keyboard Mat Replacement

Remove the battery cover.

Remove the AAA batteries from the calculator.

Remove the 5mm Philips #00 screw holding backup battery cover.

Remove the backup battery cover.

Use plastic opening tool to remove the backup battery. Place the tool in the small cut-out next to the battery and pry the battery out.

Unscrew the six 7.5mm T6 screws on the back case. You will need to use a screwdriver with a long and skinny head.

Pry back case off. Insert the plastic opening tool in the track for the protective cover and pry the halves of the case apart.

Remove the eight (8) 5mm Philips #00 screws on the motherboard.

Carefully remove the motherboard and screen. Grab the board by its side with one hand and the screen with the other. Carefully lift the two parts up.

Remove light gray rubber keyboard mat.

Clean the contacts on the keyboard with a soft cloth.