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Here is a comparison of Texas Instruments model 83+ and 86 calculators:
(Hint: mine is the crappy one with no pads and whiteout and drawings on the screen.)
Hopefully you knew enough to realize that the first step should probably be to remove the cover.
Remove the battery cover and the batteries.
If you think youre cool because your jack has a plug, think again. Take it out.
Remove all of the screws visible on the back of the calculator.
And remove the backup battery cover and its screw.
Using a wedge, slide the two halves apart by sliding the wedge down the sides.
Now lose the screws holding the silver… thing… in place.
Now remove the srews holding the PCB in place.
Remove the PCB and the screen.
And the button covers (the fun part is coming…)
repeat the steps for the other calculator.
Here comes the fun part… Take your friends calculator and spill all of the buttons on the floor, then catch the look on his face as you laugh diabolically.
I’m the best.
