Another computer won't turn on thread

[alcoholbob]

Got a:

5820k cpu
Gigabyte ud3 x99 mobo
16gb crucial ddr4 2400 ram
Gtx Titan x gpu
EVGA p2 1000 psu
Samsung Evo 1tb ssd

As soon as I turn on the pc the fans rev up and then turn off after 10 seconds. Now I did read in newegg reviews that gigabyte x99 mobos are notorious for being DOA and exhibiting no post behavior. So I remove the video card, HDD, and all but 1 ram stick but it does the same thing. Then after about the 10th restart the PSU starts whining really loud, so I disconnect everything. The psu continued to whine like a low battery smoke detector for the next 90 minutes despite being unplugged. I thought this was gonna burst into flames or something at any moment.

I plug a known good psu and now the computer won't turn on at all from the power switch or from shorting the power sw switch. It's known to be good because I was swapping it back and forth between 2 computers and confirmed 3 times that it was not turning on the new computer but the old one was posting just fine even after disconnecting wires from new pc and swapping to the old multiple times.

So the question is, did a bad PSU kill my mobo? Or did a bad mobo kill the PSU? Or were they probably both DOA?

 

[alcoholbob]

Hmm at this point I'm tempted to just buy a prebuilt computer. From newegg reviews it looks like a lot of cheaper x99 boards have this QC issue of just not posting at all. I don't wanna spend the next month swapping mobos just to get this computer to post D;

This is one of reasons I dislike building computers. Once you factor return shipping from defective items it can add up and cost more than a cheaper pre-built system.

 

[Ketchup]

There could be a short somewhere. Have you tried it out of the case yet? If you are dealing with electrical damage, you can ofter see it on the board (although a magnifying glass may be required) or smell it in the PSU.

A good test would be to put the new power supply into the other computer and see what happens.

 

[alcoholbob]

There could be a short somewhere. Have you tried it out of the case yet? If you are dealing with electrical damage, you can ofter see it on the board (although a magnifying glass may be required) or smell it in the PSU.

A good test would be to put the new power supply into the other computer and see what happens.

But doesn't that risk blowing my old computer? At least I can return anything new back to Amazon.

Also doesn't a PSUs capacitors whining at like 85db for a good 90 minutes after unplugging it from the wall sound like a dying PSU? I mean I put the PSU on a kitchen counter top like 40 feet away and I could hear the capacitors whining. I mean it might blow up the next time I hook it to the wall lol.

 

[Ketchup]

But doesn't that risk blowing my old computer?

If it was a cheap brand, I would say yes.

Honestly, I would at least RMA the power supply at this point. The noise you mentioned sounds like coil while, which in and of itself won't cause anything to fry, but should not be occurring with a new unit.

As for the motherboard, take it out of the case, only fan connection used should be the cpu fan, plug in other essential components. Do a CMOS reset. Plug in your known working power supply. If it still doesn't work, might want to RMA the board as well.

 

[alcoholbob]

Here's why I think the mobo is dead. When I hook up modular power cables connected to my old pc to my old psu if it's plugged in it starts making a light coil whine (with pc off). With no cables hooked up to the psu it's completely silent. When I hook up the modular power cables to the x99 mobo I hear absolutely nothing, like there's no electrical current going through it or something.

 

[denis280]

That psu is the one that killed your motherboard,as mention by ketchup rma both.

 

[alcoholbob]

A good test would be to put the new power supply into the other computer and see what happens.

Good news, I found it out was the new PSU. Bad news, my old computer doesn't post anymore either. Now I got 2 dead PCs. I officially retire from building my own computers and I'm going prebuilt from now on. Lmao. Everything is up in smoke.

Guess I'm stuck on a Macbook Air for the next 2 weeks. I haven't played games on minimum details in a long time.

 

[Ketchup]

Do you think the new power supply damaged your old board? If so, that would be on EVGA. That would be quite surprising though. Can you see some damage on the board?