Question PC won't boot or wake from sleep unless PSU is uplugged/replugged ?

[shipmaster1995]

Hello all,

I've been running into issues the past 2 days when trying to start my PC in the morning after it has been either shut off at night or left to sleep. When I go to power on the PC, I hear a click sound which indicates that my PSU is trying to turn on, but then nothing will happen (no fans spinning or LEDs turning on). To remedy this and turn on my PC, I need to unplug my power cord to the PC, hold down the power-on button for a few seconds (alternatively I have just walked away from the PC for a couple minutes while it is unplugged and it also worked), then when I reconnect the power cable and press the power button it will boot the PC. Once the PC is on it runs with no issues and does not suffer from any sudden loss of power, or less performance than usually.

This issue suddenly popped up 2 days ago and I have not made any changes to the hardware or the software since then. I have listed my specs below:

PSU: Corsair SF750W
Mobo: MSI MPG B650I Wifi
GPU: Radeon 7900XT
CPU: Ryzen 7800X3D
Ram: Corsair Vengeance DDR5 6000MHz 32GB (XMP enabled, and has been since the day I got it)

The motherboard, RAM, and PSU are all around 1 month old only, and the GPU and CPU are only around 3 months old (I changed some components of my build). If anyone has any ideas as to what could be causing the issue I would be open to trying anything.

 

[pete_101]

Hello all,

I've been running into issues the past 2 days when trying to start my PC in the morning after it has been either shut off at night or left to sleep. When I go to power on the PC, I hear a click sound which indicates that my PSU is trying to turn on, but then nothing will happen (no fans spinning or LEDs turning on). To remedy this and turn on my PC, I need to unplug my power cord to the PC, hold down the power-on button for a few seconds (alternatively I have just walked away from the PC for a couple minutes while it is unplugged and it also worked), then when I reconnect the power cable and press the power button it will boot the PC. Once the PC is on it runs with no issues and does not suffer from any sudden loss of power, or less performance than usually.

This issue suddenly popped up 2 days ago and I have not made any changes to the hardware or the software since then. I have listed my specs below:

PSU: Corsair SF750W
Mobo: MSI MPG B650I Wifi
GPU: Radeon 7900XT
CPU: Ryzen 7800X3D
Ram: Corsair Vengeance DDR5 6000MHz 32GB (XMP enabled, and has been since the day I got it)

The motherboard, RAM, and PSU are all around 1 month old only, and the GPU and CPU are only around 3 months old (I changed some components of my build). If anyone has any ideas as to what could be causing the issue I would be open to trying anything.

Try a little experiment next time you're shut it down for the night (you'll need to do a restart), go into BIOS and turn off XMP and see if that changes anything.
I had all sorts of power issues because of XMP on a B650 motherboard, I ended up buying EXPO to solve the issue.

 

[shipmaster1995]

Try a little experiment next time you're shut it down for the night (you'll need to do a restart), go into BIOS and turn off XMP and see if that changes anything.
I had all sorts of power issues because of XMP on a B650 motherboard, I ended up buying EXPO to solve the issue.

Unfortunately disabling XMP didn't seem to do anything and I still needed to unplug the PC before being able to boot it.

 

[pete_101]

Unfortunately disabling XMP didn't seem to do anything and I still needed to unplug the PC before being able to boot it.

Ok, that was the easiest thing to check.
In order for a PC to start the power supply constantly supplies 5v to the board and when you press the power button, or in sleep mode, press a key on the keyboard etc the motherboard communicates with the PSU to fully power up and vice vera the PSU tells your PC when it's fully powered and safe to start.

So either the PSU isn't doing it's part, or the motherboard isn't getting the message that it's safe to start. Given it's a time thing, I'm thinking more likely the motherboard has the issue in it's firmware. Short of replacing the motherboard, all I can suggest is update the BIOS to a later version (assuming your not already on it), this might not do much, but it's all I can think to do. I guess if you had a spare PSU kicking around you could give it a try, but this is probably not practical to do.

 

[shipmaster1995]

Ok, that was the easiest thing to check.
In order for a PC to start the power supply constantly supplies 5v to the board and when you press the power button, or in sleep mode, press a key on the keyboard etc the motherboard communicates with the PSU to fully power up and vice vera the PSU tells your PC when it's fully powered and safe to start.

So either the PSU isn't doing it's part, or the motherboard isn't getting the message that it's safe to start. Given it's a time thing, I'm thinking more likely the motherboard has the issue in it's firmware. Short of replacing the motherboard, all I can suggest is update the BIOS to a later version (assuming your not already on it), this might not do much, but it's all I can think to do. I guess if you had a spare PSU kicking around you could give it a try, but this is probably not practical to do.

So while I was testing XMP and whatnot, I realised that the issue happens even when I don't leave it overnight. Like I can restart the computer and it will work, but if I press the sleep button or shutdown on Windows I will run into the problem. My BIOS is indeed the most recent version. I don't have a spare PSU or Mobo sitting around unfortunately, so I sent a message to corsair to see what their thoughts are, but I'm also going to try changing my RAM sticks (I have a spare set and I'm just curious to see if there will be a difference) and maybe in the process of unplugging and replugging all the power connetors hopefully something fixes.

 

[shipmaster1995]

Expanding on this. Tried with different Expo ram, still running into the same problem. Would be grateful if anyone could shed some light My current workaround is to just leave my PC on with the monitors timing out to save on power.