PSU issue or mobo issue, can't decide

[blackhydra866]

My computer stopped working today. When I power it on, the fans and lights are working but there are no beeps and no signals to my monitor. The only indication of something being wrong is a steady red LED light on my motherboard (ASUS P7P55D-E).

I tried reseating the RAM and switching it, same thing.
Swapped out graphics card for an older one, same thing.
Reseated the CMOS battery, same thing.

I'm willing to try anything else that may help but it's looking like a mobo or power supply issue but i'm not sure which it could be. I've only had the motherboard for about a year now, the PSU is 2-3 years old, had it with my old build and carried it over.

Thanks in advance.

EDIT:
here is the PSU.
here is the mobo.
if needed..

 

[arson94]

By steady red LED light you mean the MemOK! light? Either way, your motherboard should beep if you try to boot with no RAM installed. Have you tried that to see if it'll respond to that?

 

[blackhydra866]

By steady red LED light you mean the MemOK! light? Either way, your motherboard should beep if you try to boot with no RAM installed. Have you tried that to see if it'll respond to that?

Yes it's the LED by the MemOK button. But it seems to act differently at random. A minute ago it was blinking over and over but now i've reset it and it's staying steady.

And yes it beeps as it should when there is no RAM.

 

[arson94]

Well your board works that far then. I know you mentioned you tried switching your RAM. I just noticed that the light blue RAM slots, slots 2 and 4, are the 1st channel on your board. So, if you only have 2 sticks of RAM, they need to be in the light blue slots. I don't know if that's what you meant by saying you tried switching RAM.

Also, when you reseatted the CMOS battery, did you try to clear CMOS or reset BISO? If not, I would try that too. And if you know anybody that usually has some techie gadgets, see if they have a PSU tester.

 

[blackhydra866]

Well your board works that far then. I know you mentioned you tried switching your RAM. I just noticed that the light blue RAM slots, slots 2 and 4, are the 1st channel on your board. So, if you only have 2 sticks of RAM, they need to be in the light blue slots. I don't know if that's what you meant by saying you tried switching RAM.

Also, when you reseatted the CMOS battery, did you try to clear CMOS or reset BISO? If not, I would try that too. And if you know anybody that usually has some techie gadgets, see if they have a PSU tester.

I put both RAM sticks in the blue slots and it started error beeping again, not sure if it's the same beeps as when you have no ram. 1 long beep, 2 short. After that I put the sticks in the black slots again and it stopped beeping but still doesn't work.

I thought reseating the battery cleared it, looks like I was wrong. How do I properly reset it? And how exactly do I reset my BIOS as well? I'll do that too.

Also, I dug through my newegg history and it looks like I bought my power supply back in 2008. Could it just be on it's way out? I'm not sure if it would show symptoms like these.

 

[arson94]

According to Asus, 1 long 2 short beep codes refers to a memory issue. Keep your RAM in the light blue slots if you only have 2 sticks. Try booting your computer one stick at a time with each stick in each slot and see if any combination of either stick in either of the blue slots results in a post or not.

If the computer posts or boots with either stick alone in either slot, try the computer again with both sticks together in the blue slots again, sometimes it works.

Resetting the CMOS/BIOS is done a couple of different ways.

1. You can unplug the computer, push the power button to flush all power from the system, and pop the motherboard battery out for about 10 minutes. Then just put it back in, plug the computer back in, and turn it on.

2. Try this method from Asus


It's also possible the PSU might be done, but without a PSU tester or another PSU, we can't really test that.

 

[blackhydra866]

According to Asus, 1 long 2 short beep codes refers to a memory issue. Keep your RAM in the light blue slots if you only have 2 sticks. Try booting your computer one stick at a time with each stick in each slot and see if any combination of either stick in either of the blue slots results in a post or not.

If the computer posts or boots with either stick alone in either slot, try the computer again with both sticks together in the blue slots again, sometimes it works.

Resetting the CMOS/BIOS is done a couple of different ways.

1. You can unplug the computer, push the power button to flush all power from the system, and pop the motherboard battery out for about 10 minutes. Then just put it back in, plug the computer back in, and turn it on.

2. Try this method from Asus


It's also possible the PSU might be done, but without a PSU tester or another PSU, we can't really test that.

Either combination in the blue slots results in the error beeps.

I've taken out the battery to attempt another reset. Will edit this in roughly 10 minutes.

And I couldn't find any CMOS jumpers on my board or CMOS switches. Maybe i'm not looking close enough but they don't seem to be there.

There's no way of testing my PSU and I don't have any other ones unfortunately.

 

[cliffro]

CMOS jumpers are here

I included Asus' directions to clear it.

 

[blackhydra866]

Put the battery back in, booted it with both sticks in the blue slots and it is working perfectly fine now. Looks like all it needed was a CMOS reset.

Thank you.

 

[blackhydra866]

Best answer selected by blackhydra866.

 

[Dark Lord of Tech]

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