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I have a p6n sli . After a power outage it wont start. No beep, no power light, no fans. The only sign of life is amber l

Tags:
  • Power Outage
  • Light
  • Motherboards
  • SLI
  • Power
Last response: in Motherboards
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March 28, 2014 12:45:22 PM

P6n sli won't start after power outage.

Amber light next to CMOS battery stays on. Nothing else happens.

More about : p6n sli power outage wont start beep power light fans sign life amber

a b V Motherboard
March 28, 2014 12:57:19 PM

Try reseting the CMOS, take the battery out and then put it back in, your motherboard might have a button to do this.
Also if this does not work, replace the CMOS battery.
Try taking one card out, also it might have damaged the power supply.
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a c 111 V Motherboard
March 28, 2014 1:03:31 PM

There could be a number of possibilities. Before ruling your computer dead, try the following:

1. Plug it in to a different outlet
2. Use a different power cable from wall/outlet to PSU
3. Disconnect the P1 connector from the motherboard, and then stick a paper clip in the green wire pin socket and any neighboring black wire pin socket
4. Check the motherboard for signs of damaged components (I.E. popped capacitors)
5. Use a known working PSU
6. Check voltages at molex connectors, if using a known working PSU. Yellow wires should be at about +12v.
7. check voltages at P1 connector, while it's connected to the motherboard.
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March 28, 2014 3:56:11 PM

I tried most of those already. I'm stuck using a smartphone so trying to not type too much. Sorry for not including all details.

Mostly I'm wondering if dead motherboard is likely. Or does the amber light mean the mobo is still alive.
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a b V Motherboard
March 28, 2014 4:21:41 PM

Depends, it might be the Power Supply, do you have another one you can try?
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March 28, 2014 4:29:40 PM

Yes. Tried new psu.
Also
- breadboard
-static discharge
- reset CMOS
-new CMOS battery
-others I can't think of right now
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a b V Motherboard
March 29, 2014 3:53:06 AM

Sorry if you've tried this, have you taken one of the Cards out?
Also, are there any other SLI bridges you can try or any other PCI cables you can try?
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March 29, 2014 10:13:32 AM

Yes, I actually breadboarded it. Still no post. No fans no lights (except CMOS light).

Paper clip test turns on PSU fan. But off again when connected to mobo.

Yesterday I did notice a couple bulging capacitors.
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March 30, 2014 11:23:30 AM

Is there any way to narrow down what is wrong?

If I know its the mobo I can just replace it. Or could it be the CPU?

Basically again problem is:

-breadboarded there is no post, no fans, no power lights

-amber light next to CMOS battery is on
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a c 111 V Motherboard
March 31, 2014 10:12:45 AM

The bulging capacitors is a clear sign of mobo damage. You'll need to replace your motherboard.
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April 1, 2014 11:04:06 AM

Ok, thanks. I thought that just some bulging was not a issue.
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April 3, 2014 2:25:02 PM

Replaced two bulging caps. Still same problem. There are about ten more of the same caps but they look ok. Some other ones from the same company (KZG) look ok as well.

Should I go ahead and replace them all or is it pointless?
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a c 111 V Motherboard
April 3, 2014 6:45:38 PM

I would replace them all. The chemical composition is the same in all of them, so chances are high that others have failed, even though there is no physical sign of damage. Sometimes the capacitors dry up on the inside.

Also look for leaking capacitors, and not just at the top, either. Look closely at the bottoms. If you see any dried substance in orange, gray, brown, white, or black, it probably means the capacitor(s) next to the discharge have leaked.
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April 3, 2014 8:15:57 PM

Thanks. I'll let you know how it goes.
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