PSU died, monitor detects no display input, but all fans are on.

Kenny Tacos · Dec 28, 2015

Last night my computer started vibrating, humming, and clicking so I unplugged it and went to sleep. Come morning, I dusted everything in my PC thinking some dust was messing with a fan, but the sound persisted; that's when I found out it was my power supply. Now I'm trying to boot my PC with my backup PSU (530w) and everything has been hooked up properly multiple times but my screen detects no input. All of my fans are spinning and I thought it might have killed my video card, but my 970 works fine in my friend's PC. Is my motherboard dead? (A replacement psu is coming eventually).

Lazerbacon · Dec 28, 2015

How much lower is the voltage of the replacement PSU? If you have any OC it might not be enough

ingtar33 · Dec 28, 2015

your replacement power supply probably can't provide the power necessary on the 12V rail to power the 970. what is the "replacement" power supply? something you had laying around? something you bought?

Kenny Tacos · Dec 28, 2015

ingtar33 :

I had a 730w PSU before and the replacement is a working 530w PSU I already had. My CPU is overclocked, but I can't change that if I can't get into the BIOS because my PC doesn't boot or display anything. I'm sure I'm getting enough power because I also tried a Radeon HD 7450 in my system (very low power card that takes no external power) and I still wasn't getting any display output. Btw my 970 worked in my friend's PC with only a 500w power supply.

ingtar33 · Dec 29, 2015

you are plugging the monitor into the gpu right?

and again, how do you know the "old" power supply is working properly? Just booting without a gpu doesn't require much power in the first place.

LucasXD · Dec 29, 2015

are you forgetting the plastic 4pin mobo connecto

Kenny Tacos · Dec 29, 2015

Popped out the CMOS battery for 15 minutes and put it back in; works fine with the old PSU. I just wish the damn thing wasn't so loud. Sentey is sending me a replacement which I'll probably sell and upgrade to a more reliable brand like Corsair. Thanks for the input everyone.

JeroenBeunckens · Feb 11, 2017

I have the same problem with a Corsair PSU, any solutions for this yet or was it just a faulty PSU?

Kenny Tacos · Feb 22, 2017

JeroenBeunckens :

I had a s****y generic brand PSU and it was just a piece. I solved my original issue by popping out the CMOS battery for 15 minutes. If your PSU hums there's really nothing you can do about it. Buy one with a hybrid fan mode so it doesn't run the fan all the time. Power supplies suck I've always had trouble with them. EVGA is good tho

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