Wont post after restarting or monitor is off

Dooey · June 3, 2022

Recently built my first rig which includes:

i7-127000k

Asus ROG B660 Wifi D4 Motherboard

16gb G-Skill DDR4 Ram

Gigabyte RTX 3080 OC

500gb Samsung 980 Pro NVME SSD

SanDisk 2tb SSD

Windows 10 64x Home Ver 21H2

After struggling with the initial install, I eventually got all the bios/drivers and windows updates out of the way. Throughout that, when I would have to restart it would not post. The motherboard would blink through the initial light sequence, then settle on the green and white lights. I read that they were a GPU related issue, so I reseated the GPU multiple times and checked the connections on everything. After all the updates, and tests I found the system wouldn't post if I either turned off my monitor, or restarted the system. The diagnostic lights wouldn't come on if the system was turned on and the monitor was off. It would simply not post but with no lights. When the monitor was already on and the system is turned on, its boots to the bios like any other computer. No lights or anything. Bios versions of everything are:

Mobo - 0418

GPU - 94.02.71.C0.29

OS Build - 19044.1706

I've tried using a different port on the GPU and switched between DP to HDMI, but none of it worked. Another fix I tried was that it could be the slots for the RAM, and swapped there places from 1&3 to 2&4 a couple times with no luck. This whole issue isn't really back breaking, but more of an inconvenience. Any advice would be very appreciated. Thank You!

An0maly_76 · June 3, 2022

I've had a very similar issue, I believe it is related to Microsoft's incompetence in properly handling sleep mode and waking from it. There is a "fast startup" option which can apparently cause the GPU to misfire on startup. I tried disabling it and it seems to be helping, though I haven't determined whether it has actually fixed the issue with waking from sleep mode just yet. For the moment, seems to have solved the no video on startup.

https://www.4winkey.com/windows-10/windows-10-will-not-wake-up-from-sleep-mode.html

Uptivuptiz · June 3, 2022

5 minutes ago, An0maly_76 said:

I've had a very similar issue, I believe it is related to Microsoft's incompetence in properly handling sleep mode and waking from it. There is a "fast startup" option which can apparently cause the GPU to misfire on startup. I tried disabling it and it seems to be helping, though I haven't determined whether it has actually fixed the issue with waking from sleep mode just yet. For the moment, seems to have solved the no video on startup.

https://www.4winkey.com/windows-10/windows-10-will-not-wake-up-from-sleep-mode.html

Disabling Fast Startup can also be "emulated" if you hold down shift while pressing Shutdown in the start menu. Then you don't have to jump into Control Panel. Convenient knowledge for testing

EDIT:

If you press Restart even with Fast Startup enabled, the system will do a full shutdown as if Fast Startup is disabled. Fast Startup only applies when the machine has been shut down and not restarted.

Edited June 3, 2022 by Uptivuptiz
Added more info

SavageNeo · June 3, 2022

1 hour ago, Dooey said:

I either turned off my monitor

that is normal, my pc also does that.

1 hour ago, Dooey said:

or restarted the system

not normal, the VGA light means that there is either problem in the gpu, or no monitor detected, the green light mean that it has booted to bios. if you combine those lights, you can assume that the pc has posted in the bios, but cannot either display anything, or does not regognize the monitor.