Question about HP 48gx Calculator
The numbers 1-3 and the (-) keys on the keypad wont work
In the keyboard test (below), make sure the keys are pressed in the right order. If the calculator fails the keyboard test then it needs repairs. (Ignore the beginning of the post and skip to the last part For Repairs )
You can reset the calculator:
Turn the back of the calculator towards you. Extract the top left rubber pad on the back of the calculator and use a paper clip to press the Reset button. If that does not restore the calculator to health, you should perform the diagnostic tests.
Make the calculator perform a
The self test will continue repeatedly until you perform a
If you do not see IROM OK and IRAM OK, the calculator requires service.
If the above procedure is successful, you may want
to test the keyboard.
If you follow the proper sequence and a hexadecimal number appears after pressing a key, the calculator requires service.-
You can also try this site. They do repairs on most models, except the newer ones.
Posted on Jun 16, 2010
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Posted on Jan 02, 2017
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