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Desktop - no video, sound, or keyboard lights

by funkjunky8 / April 21, 2011 7:49 AM PDT

I'm normally the guy who fixes peoples computer (not professional, just hobbiest), but this issue is a little elusive.

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Clarification Request
(NT) Have you tried what you suspect? Switch psu...
by my-tech / April 21, 2011 7:54 AM PDT
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Not yet. Tomorrow i will try...
by funkjunky8 / April 21, 2011 8:46 AM PDT

I did try replacing the GPU and that didn't solve it.
Tomorrow I will contact local suppliers and try and get my hands on a temp GPU.

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Clarification Request
I wonder.
by R. Proffitt Forum moderator / April 21, 2011 8:03 AM PDT

I had an unit like that. It turned out that someone unplugged the ATX12V connector.

Fans and such worked, but no blink on the keyboard or much else.

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are you talking about the 24 pin mobo connector?
by funkjunky8 / April 21, 2011 8:52 AM PDT
In reply to: I wonder.

If so, I think your hypothesis may be correct.
When I was trying to get it to work earlier, I reseated all of the power cables including that one, and it turned on for a while, before failing again.

All Answers

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Sounds like the ATX12V is unplugged. SEE PICTURE AT LINK.
by R. Proffitt Forum moderator / April 21, 2011 9:54 AM PDT
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by funkjunky8 / April 23, 2011 4:16 PM PDT

I admit I didn't replug the processor power plug. It is under a huge power sink, so in order to replug it in I have to remove the heatsink and reattach it.

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Ok, I just reseated the connector for the processor.
by funkjunky8 / April 24, 2011 9:18 AM PDT

By reseating that cable I was able to get to the bios screen.
I checked the voltages, and noticed lag on the bios screen (never seen this before).
I don't know how to compare any voltages, besides the vcore, but the vcore was sitting at 1.72V, even though it is set at it's default of 2.00V. Is that an issue?

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by adamvaldez / April 22, 2011 7:02 AM PDT

Ok I am quite sure that this is a motherboard related issue. The MB needs to be fixed. After some point of time the capacitors becomes week and that result in the above situation. Again there can be 1000's of more reason for your problem but this one come first in my list

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It was the power supply.
by funkjunky8 / April 30, 2011 6:24 AM PDT

I bought a new power supply and everything is honky dorey now.

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