Why won't my hp 48gx calculator finish backing up to my computer?

SOURCE: Rs 232 port in the HP 48GX

Try http://www.fixthatcalc.com/. A friend of a friend sent his HP 48 in for repairs. You may want to check into them.

SOURCE: LEAKED bATTRIES

Try http://www.fixthatcalc.com/.

SOURCE: HP 48GX problem

Hello,
.
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 dagnostic tests.

The following procedure valid for the 48G should work for the HP48GX.
Make the calculator perform a
Self test.

1. Turn calculator on
2. Press and HOLD the key [ON]
3. Press and release the key with "E" to its right (the one before last in first row)
4. Relaese the [ON] key.

1. Press and HOLD the [ON] key
2. Press and release the "C" key
3. Release the [ON] key.

1. Turn calculator on
2. Press and HOLD the [ON] key
3. Press and release the "D" key.
4. Release the [ON] key
5. Press and release the "E" key. KBD 1 should appear on the top left corner of the screen.
6. Starting at the upper left corner of the keyboard, and moving Left to right, press every key in sequence. If you follow the sequence and the keys are functioning properly you should hear a hight pitch sound at each press.
   
7. If everything is OK, when you press the last key (+) the screen displays KBD 1 OK.

SOURCE: hp 48gx calculator died during

Turn Calculator ON. Press ON button and hold pressure. Press [+] key repeatedly until screen darkens to your liking.

SOURCE: HP 48gx Calculator seems to turn on but display

It might be too dim.
Turn calculator ON. Then press the ON button and hold pressure. Press the PLUS + repeatedly until screen darkens.