compaq DC7900 desktop doesn't work

October 18, 2011 at 02:04:37
Specs: Windows XP, non
I changed jumper on motherboard while the set is on ," thinking that will clear pass word on windows , because i forget mine, you know war and long time did not open it".
the set does not power on, only a small lamp beside ram slot is on ,
my computer is hp compaq dc 7900 ,

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October 18, 2011 at 04:41:13
That may depend on what the jumper was that you reset, whether you reset it back, and whether the machine was unplugged at the time. If it was the CMOS jumper, usually near the CMOS 'coin' battery and the system was unplugged and it was switched back before it was plugged in again, you should be fine, but you may need to reset your BIOS to defaults (check your manual to entering set up, usually a key to tap at start up). If the power was plugged in when this was done, I am not sure of the consequences exactly, but it MAY be really bad for the motherboard. If there was another jumper, you may need to indicate what jumper either by reading the markings, or by checking the manual online and posting that back.

If it works again, you many get some help from HP support to getting back into it IF you can prove ownership to them, but they probably will want money since you probably are out of warranty. Otherwise, you can do a factory restore and loose all data.

You have to be a little bit crazy to keep you from going insane.

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October 18, 2011 at 06:00:20
You should not need a factory restore. Your data is most likely intact. You should set the jumpers back and reset the bios. Trying to clear the bios with the power on might have written rubbish in the bios.

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