Step 5 - repair Back Case
Using a Philips Screwdriver #00 unscrew the twelve
11.8mm screws shown in the picture and located on the
back of the calculator.
Step 6
Unscrew the 19mm screw located near center of the
back of the calculator.
Remove the panel being held by the screw.
Installing Texas Instruments TI-92 Motherboard
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