Re: HP 50g SD card reader problem Message #3 Posted by JJB299 on 22 Aug 2010, 1:06 a.m., in response to message #2 by Vieira, Luiz C. (Brazil)
Luiz,
I found the problem!
To answer your questions, yes I've tried all of those points.
The card is a lowly 256MB, but the card wasn't the cause.
The card reader assembly inside of the calculator had a bad contact. I was focusing on the upper portion of the card reader near the SD card contact. But the problem was a contact on the lower left corner of the card reader (when facing the back of the calculator with the case open).
I'll try to recreate it here (view with Courier font):
|| | | | | | | | | | (top pins into board)
____________________
| |
| SD card reader |
~~~~~~~~~~~~~~~~~~~~~ (break)
| |
|*_________________|
* = bad contact near bottom of calculator.
I couldn't manage to solder it on, since the original contact was adhesive and the solder wouldn't stick. I just tried to hold it against the board contact with padding.
After that, the card formatted and wrote just fine.
Hope this helps someone else with the same problem.
P.S. Not for the faint of heart (look for how to disassemble a 50g on Y**Tube). It looks painful, but the screen went back on fine.
-Justin
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