HP PC not booting locking on bios with lines on the screen.

I'm having a problem with a HP PC that hanging on the boot process. I tested the power supply with a power supply testes and It is now showing the -5v.
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JohnBusiness Consultant (Owner)Commented:
I think you are saying you have a power supply problem (which will cause this), but I am not certain what your power supply point is.

Try booting just to BIOS (Hold F1 on boot (check for HP)). Does it boot just to BIOS?
Try booting with a bootable DVD or CD. Does it boot this way?

If no kind of boot at all, then the power supply may  be bad, or the motherboard may be bad.

... Thinkpads_User
To add to thinkpads_user's advice:

A quick and easy solution is to grab another power supply and switch it out and see if it boots normally. If it boots normally, the power supply is you problem child. If it doesn't then its either your motherboard or one of your attached peripherals.
armandocgAuthor Commented:
It will not boot to BIOS nor does it try to boot from HD or CD.
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JohnBusiness Consultant (Owner)Commented:
So then, per my earlier post, probably a bad motherboard or power supply.

... Thinkpads_User
here a detailed troubleshooting guide  - use the minimum setup as described :
http://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html                  (Short-overview-of-how-to-troubleshoot-bad-hardware-when-a-pc-does-not-post)

in case the disk has problems, this can help also


regarding -5V modern PS do not have it anymore

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armandocgAuthor Commented:
I took the motherboard out of the case and it works fine. It seems that the motherboard is shorting out to the case. I going to to isolate the motherboard from the case by using non conductive washers and see if that fixes the problem.
>>  I going to to isolate the motherboard from the case by using non conductive washers and see if that fixes the problem.  <<   did you check if all holes correspond to a mounting post?
if YES - there should be no shorts - and no need for washers
Did you finish testing the power supply yet? Have you absolutely confirmed that it's the mobo?

And the motherboard shouldn't be shorting to the case. Unless you have your mounting posts touching something they shouldn't be touching. The motherboard should be in constant contest with the case.
armandocgAuthor Commented:
It turn out to be a problem with on the memory modules not making good contact. After I reseated the memory module everything worked fine.
then i don't understand your previous post about the mobo shorting....
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