There seems to be a problem with the PC, possibly related to the power supply unit.
There seems to be a problem with the PC, possibly related to the power supply unit.
So around a week back, I disconnected all components from my PC—excluding the CPU, heatsink, and RAM—and cleaned out the GPU, radiator, fans, power supply, and case using the compressed air we found in our garage.
It was just a cleaning session since the areas were extremely dusty.
After reconnecting everything, when I pressed the power button it didn’t work at first but functioned after about ten minutes.
The motherboard and GPU lights were on, but the case and motherboard power button remained inactive.
Since the PC finally started working, I thought the power supply might be failing.
Last night before shutting it down, I heard a single beep through my headset—something unusual for this situation. It was just one beep, not a BIOS code.
Every evening I manually shut the PC off via a custom command line to relax, then let it power down after about 20 minutes.
Yesterday morning I turned it on and everything was working properly; lights were on but no one was home.
I removed all components again (besides CPU/heatsink and RAM), checked every cable, and found no damage. I even swapped out the dead CR2032 battery—no BIOS alerts beforehand.
After applying CRC electronics cleaner to the cables and MBO connections, I let it dry and reconnected everything. Still nothing.
Even with the GPU removed and one RAM stick left in, I swapped it to another channel and it worked. But when I turned it off, plugged it back in, and reconnected, it wouldn’t power on again.
I’ve been fiddling with all the cables, reseating the RAM twice, and reconnecting everything multiple times, but it still boots up. It seems like the BIOS settings might have been reset to default.
Is this a sign my PSU is failing?
Hardware: ASUS Hero VII
Power Supply: Corsair RM750
GPU: Asus Strix 980TI
RAM: 2x 8GB Corsair Vengeance DDR3 1333hz
PSU age in your setup?
To confirm if your PSU is the problem, consider getting a well-built PSU from someone else to test.
Motherboard: ASUS Hero VII
Should I recommend Maximus or Crosshair?
RAM: 2x 8GB Corsair Vengeance DDR3 at 1333hz
Are your RAM modules confirmed for this configuration?
I don't recall the precise age, but I assembled the PC about 8 to 10 years ago, which is roughly the timeframe.
Unfortunately, there are no neighbors nearby, so I might consider purchasing a new one and returning it. Since the holidays are approaching, many locations offer return policies.
Ah, sorry—it's a Maximus Hero VII.
My CPU is an i7 4790k, and I forgot to mention that.
I also have two 8GB DDR3 RAM sticks at 1333hz speed.
Overall, my PC consists mainly of older components, around 8 to 10 years old.
Edit: Besides the AIO cooler for my CPU because the previous one failed, and a few fans too.
Wow, if that Corsair RM750 is the right power supply, it comes with a 10-year warranty. You're probably getting ready for a replacement soon.
My son gave me his homemade PC a few years back. It was about 5 years and six months old. It stopped working. I took it to a repair shop where they found out it was the power supply unit.
I bought a new one and everything worked fine.
The warranty on the old PSU... it's 5 years!
I'll attempt to contact Corsair. For those familiar with their process, do they offer RMAs for PSU? I plan to send the new one first and then return the old one. Ideally, I'd like a working PC in between shipments if that's possible. (At least as it is now)
I hadn't contacted Corsair yet, but it occurred again this morning.
I removed one RAM stick which seemed possibly not fully seated, but it didn't affect the system when I restarted the PC.
After unplugging all components from the PC, including the power cable, and switching the Surge Protector on, the issue resolved.
Note: Previously, plugging the PC's power cable directly into the wall didn't work.
We're still considering the PSU as a possible cause?
Does the air tank in your garage have a water/oil filter inline?
When a compressor fills, it is also pulling in water due to humidity. After a while, and even when you regularly drain the tank, the tank and lines will have residual water in them. If you don't have that filter you may have hit something with water.
I think it only comes with an air filter, but I have never noticed any humid or wet air when using it.
For anyone who knows more about it than I do, it's:
21 gallon 2.5 HP 125 PSI Cast Iron Vertical Air Compressor
from Central Pneumatic. Item#61454.
That said, the PC does seem to run after a bit of plugging things in and out of it.
Once it starts it doesn't seem to have much issues, and it's not every time it turns off where it has issue either.
I used the air compressor over a week ago, I imagine if anything got wet, it'd be dry by now and not cause too much of an issue--Or if it did, a much more noticeable issue?
I've contacted Corsair Support and am hoping for a positive outcome since the warranty only covers five years. It's been ten years since I purchased the PSU, but we'll see how things turn out—perhaps Corsair recognizes my long-term loyalty.
Regarding the PC itself, it appears that whenever I power it off, it doesn't automatically restart unless I completely disconnect all cables from the back, including the power cable, reinsert the RAM, and briefly switch the power button on the PSU several times, sometimes even pressing the surge protector button.
I'm starting to consider leaving the PC off now or using sleep mode instead of a full shutdown.