Re: HP 48GX Calculator Message #2 Posted by Vieira, Luiz C. (Brazil) on 15 Apr 2004, 1:15 a.m., in response to message #1 by raze
Hi, raze;
please, locate both [ ]C and [ ]E keys in the top key row. Use the following procedure so you can start a complete, "circular" self-test:
- while the calculator is ON, press the [ON] key and hold it down;
- while [ON] is held, press and release [ ]E;
- release [ON]](this is called [ON]/[E])
the calcualtor starts a self test that con only be interrupted with the sequence:
- press the [ON] key and hold it down;
- while [ON] is held, press and release [ ]C;
- release [ON](this is called [ON]/[C])
To activate the specific keyboard test, locate the [ ]D key in the top key row. Now, while the calculator is ON, do this:
- press the [ON] key and hold it down;
- while [ON] is held, press and release [ ]D;
- release [ON]; (this is called [ON]/[D])
- press [ ]E
When you perform the [ON]/[D], an interactive "step-by-step" self test is started. When you press [ ]E, you see: ______________________
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|______________________| At this point you should press each key in the first row, left to right ( i.e. [ ]A to [ ]F), then repeat pressing all keys on each row, always left ot right, a complete row at a time, top to bottom.
I am worried about the possibility that you have a faulty (with a possible fissure) contact sheet (not a PCB, instead a "plastic", flex sheet with printed circuit) that seems to "retouch" edges when you press the mentioned area.
Hope this helps. Let us know wht happens.
Cheers and success.
Luiz (Brazil)
Edited: 15 Apr 2004, 1:19 a.m.
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