Re: 48GX - screen is all black - please help! Message #2 Posted by Raymond Del Tondo on 30 July 2009, 4:03 p.m., in response to message #1 by Kath
There are different things you could try, given you have batteries installed:
- NEVER PUT IN THE BATTERIES IN THE WRONG DIRECTION!
- ON+C
If that doesn't work, then
- If you turn the HP-48GX around, the upper right rubber foot hides a reset hole. CAREFULLY stick a needle into it until it hits ground, then remove the needle.
About the battery polarity warning: There's a big chance that you will fry the zener diode if you put in batteries with the wrong polarity.
HTH
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