Hi everyone! I'm turning to the pros for some help. Sorry for the long post, but this is part of an ongoing issue and I'm really stuck. I can't find anything helpful through searches.
TLDR: The PC will not power on. MB has power (logo LEDs light up), but no power is getting to switch. No fans spin. No response when pressing power or reset buttons, shorting across power jumper, etc.
Current Build
Initial build: March 5, 2019 - all brand new parts
During initial boot (after build), the PC was stuck in a boot loop. After diagnostics and BIOS update, PC started working fine. After a few weeks, the PC was stuck in a different type of boot loop. PC would attempt to turn on, 0.5-1 sec later the PC would shut down, restart, 0.5 sec-1 sec later PC would shut down, restart, etc. This time, it wouldn't even try to post and BIOS update didn't work. Returned MB, RAM, and CPU. Replaced MB with ASUS TUF Z390-Pro, replaced RAM with CORSAIR TX-M Series TX550M, and ordered new i5-9600K.
After rebuild with new MB and CPU, PC worked fine for a few weeks, then was stuck in similar boot loop. PC would attempt to turn on, 0.5-1 sec later the PC would shut down, restart, etc. This time RMA'd MB and PSU. ASUS "repaired" skewed pin on MB and Corsair sent a new PSU. Reassembled PC and it powered on fine.
I've been using the PC for less than 1 week and it started the boot loop again today. PC would attempt to turn on, 0.5-1 sec later the PC would shut down, restart, etc. I tried reseating RAM, GPU, checked plugs, etc. but nothing seemed to correct the issue. I unplugged the power cord and pulled the CMOS battery, let it sit for a few minutes, reinstalled the CMOS battery, plugged in the power cord, flipped the switch and saw the MB LED logo light up, pressed the power button, and nothing happened. PC didn't try to power on. NOTHING. So, this is a new problem and I'm out of ideas on how to fix it.
I checked and rechecked plugs, etc.
Current Issue
The PC will not power on. MB has power (logo LEDs light up), but no power is getting to switch. No fans spin. No response when pressing power or reset buttons, shorting across power jumper, etc.
I have no idea what to try next. Any other ideas out there?
TLDR: The PC will not power on. MB has power (logo LEDs light up), but no power is getting to switch. No fans spin. No response when pressing power or reset buttons, shorting across power jumper, etc.
Current Build
- MB: ASUS TUF Z390-Pro Gaming
- CPU: Intel Core i5-9600K
- RAM: CORSAIR VENGEANCE LED 16GB
- PSU: CORSAIR TX-M Series TX550M
- GPU: ASUS Dual GeForce GTX 1660 Ti
Initial build: March 5, 2019 - all brand new parts
During initial boot (after build), the PC was stuck in a boot loop. After diagnostics and BIOS update, PC started working fine. After a few weeks, the PC was stuck in a different type of boot loop. PC would attempt to turn on, 0.5-1 sec later the PC would shut down, restart, 0.5 sec-1 sec later PC would shut down, restart, etc. This time, it wouldn't even try to post and BIOS update didn't work. Returned MB, RAM, and CPU. Replaced MB with ASUS TUF Z390-Pro, replaced RAM with CORSAIR TX-M Series TX550M, and ordered new i5-9600K.
After rebuild with new MB and CPU, PC worked fine for a few weeks, then was stuck in similar boot loop. PC would attempt to turn on, 0.5-1 sec later the PC would shut down, restart, etc. This time RMA'd MB and PSU. ASUS "repaired" skewed pin on MB and Corsair sent a new PSU. Reassembled PC and it powered on fine.
I've been using the PC for less than 1 week and it started the boot loop again today. PC would attempt to turn on, 0.5-1 sec later the PC would shut down, restart, etc. I tried reseating RAM, GPU, checked plugs, etc. but nothing seemed to correct the issue. I unplugged the power cord and pulled the CMOS battery, let it sit for a few minutes, reinstalled the CMOS battery, plugged in the power cord, flipped the switch and saw the MB LED logo light up, pressed the power button, and nothing happened. PC didn't try to power on. NOTHING. So, this is a new problem and I'm out of ideas on how to fix it.
I checked and rechecked plugs, etc.
- 24-pin connector is good
- 8-pin connector is good
- Fans are all plugged in
- RAM is seated and secure
- GPU is seated and secure
- CMOS battery is seated and secure
- MB is receiving power because the TUF logo lights up.
- I am down to bare bones now, so GPU and peripheral failure won't be a factor.
- Paperclip test for TX550M - fan spins so not likely a bad PSU
- Tried a spare, working PSU - no power on
- Tried shorting across the power jumper - no power on
- Tried resetting CMOS by pulling battery again and shorting RTC jumper - no power on
Current Issue
The PC will not power on. MB has power (logo LEDs light up), but no power is getting to switch. No fans spin. No response when pressing power or reset buttons, shorting across power jumper, etc.
I have no idea what to try next. Any other ideas out there?
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