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Question "Old" PC getting power but no display/no POST, all fans at full speed.

Dukesilver27-

Reputable
Dec 12, 2019
8
1
4,515
Spec: i5-12400, ASUS PRIME B660M-A D4 WIFI, Team DELTA TUF 2x8GB 3200MHZ CL16, Team MP33 1TB, ASUS TUF RX 6800 XT OC, MSI A850GF.

Brief explanation: PC started to restart randomly but boots right back up just fine, then it gets worse, random reboot keep happening more and more along with multiple failed power on before booting. Last development was PC won't boot at all but fans full blasting, RGB works except for the RAM RGB.
Leaving the PC on in this state for hours without dropping power, sometimes it POSTs but it will crash within minutes.

Chain of events that lead to this situation:
1. Friday afternoon, first random shutdown, PC boots back right up without any issue.
2. Saturday, PC has been powered on since Friday, about 7 hours of Diablo 4, random shutdown happened twice between the morning-afternoon, until Saturday afternoon, shutdowns happens a lot more frequent, PC failed to power on multiple times before reaching POST, if it got past booting it will shutdown within minutes of booting.
3. Sunday, same issue, random shutdown then multiple failed power on then shutdown again. Did a cleaning, made sure every cable are properly plugged in, afterwards the PC lasted longer before shutting down again, an hour so on average.
4. Now, it shutdown for the last time then it won't boot at all. Case fans full blast, all RGB working except for RAM, no display no sound.
5. Leaving it on in this state for hours without powering down, sometimes the PC made it to POST but crashes within minutes of POST page showing up (this only happened twice).

What I have tried:
1. Uninstalled the last drivers update (before it won't boot anymore)
2. Updated windows (before it won't boot anymore)
3. Power cycling multiple times and cleared CMOS multiple times.
4. Re-seating RAM and GPU, tried using iGPU to boot.
5. Tried to boot with 1 stick of RAM, have tried both RAMs one at a time.
6. Changing RAM slots, tried 1 stick at a time and on every slot.
7. Cleaned everything, made sure every cable are properly plugged in.
8. Tried other power cord for the PSU.
9. Tried another RAM, still no POST.

Misc details that might be relevant:
1. Every part of the PC is about 8 months old except for the GPU, bought it used.
2. Ever since a month ago, I've been having game crashes related to memory issues, not enough virtual memory related crashes, games are RE4, Diablo 4, Miles Morales. (Tried increasing the page file, still crashes, SSD is about 70% capacity)
3. I don't have access to any other parts to test out, but PSU tester is on the way.
4. RAM is not in the motherboard QVL list.
5. My power is pretty stable, I have a high quality power cord with a fuse of which the PC power cord is plugged to.
6. Noticed something weird, when I shorted the CMOS pins, the PC powers on. IDK if it is a new thing, but I don't remember it happening previously.

Please help, I'm on my wit's end.
 
Last edited:
Could be your ram. Make sure they're slotted correctly. I know I had the issue when building my PC and had to get new ram.
 
Spec: i5-12400, ASUS PRIME B660M-A D4 WIFI, Team DELTA TUF 2x8GB 3200MHZ CL16, Team MP33 1TB, ASUS TUF RX 6800 XT OC, MSI A850GF.

Brief explanation: PC started to restart randomly but boots right back up just fine, then it gets worse, random reboot keep happening more and more along with multiple failed power on before booting. Last development was PC won't boot at all but fans full blasting, RGB works except for the RAM RGB.
Leaving the PC on in this state for hours without dropping power, sometimes it POSTs but it will crash within minutes.

Chain of events that lead to this situation:
1. Friday afternoon, first random shutdown, PC boots back right up without any issue.
2. Saturday, PC has been powered on since Friday, about 7 hours of Diablo 4, random shutdown happened twice between the morning-afternoon, until Saturday afternoon, shutdowns happens a lot more frequent, PC failed to power on multiple times before reaching POST, if it got past booting it will shutdown within minutes of booting.
3. Sunday, same issue, random shutdown then multiple failed power on then shutdown again. Did a cleaning, made sure every cable are properly plugged in, afterwards the PC lasted longer before shutting down again, an hour so on average.
4. Now, it shutdown for the last time then it won't boot at all. Case fans full blast, all RGB working except for RAM, no display no sound.
5. Leaving it on in this state for hours without powering down, sometimes the PC made it to POST but crashes within minutes of POST page showing up (this only happened twice).

What I have tried:
1. Uninstalled the last drivers update (before it won't boot anymore)
2. Updated windows (before it won't boot anymore)
3. Power cycling multiple times and cleared CMOS multiple times.
4. Re-seating RAM and GPU, tried using iGPU to boot.
5. Tried to boot with 1 stick of RAM, have tried both RAMs one at a time.
6. Changing RAM slots, tried 1 stick at a time and on every slot.
7. Cleaned everything, made sure every cable are properly plugged in.
8. Tried other power cord for the PSU.

Misc details that might be relevant:
1. Every part of the PC is about 8 months old except for the GPU, bought it used.
2. Ever since a month ago, I've been having game crashes related to memory issues, not enough virtual memory related crashes, games are RE4, Diablo 4, Miles Morales. (Tried increasing the page file, still crashes, SSD is about 70% capacity)
3. I don't have access to any other parts to test out, but PSU tester is on the way.
4. RAM is not in the motherboard QVL list.
5. My power is pretty stable, I have a high quality power cord with a fuse of which the PC power cord is plugged to.
6. Noticed something weird, when I shorted the CMOS pins, the PC powers on. IDK if it is a new thing, but I don't remember it happening previously.

Please help, I'm on my wit's end.
Based on the symptoms you describe, I would have suspected the power supply first.
 
Based on the symptoms you describe, I would have suspected the power supply first.
I just bought a PSU tester, it will arrive in 2 days.
But aren't PSU suppose to be very durable? I bought a high quality unit specifically because of this reason.
 
I just bought a PSU tester, it will arrive in 2 days.
But aren't PSU suppose to be very durable? I bought a high quality unit specifically because of this reason.
Think of the Apollo program and all the testing that went into it and there were still failures. New things fail all the time. If they were designed to have fewer failures, one couldn't afford them.