Question PC only posts on second attempt after cutting power

[silsso]

Hello,
PC:
AMD Ryzen 5 5600 3.5 GHz 6-Core Processor
ID-COOLING SE-224-XTS BLACK 70 CFM CPU Cooler
Gigabyte B550M DS3H AC Micro ATX AM4 Motherboard (rev.1.5/1.6)
Kingston HyperX Fury 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory
Kingston NV2 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
Gigabyte GAMING OC GeForce GTX 1660 SUPER 6 GB Video Card
Montech AIR 100 LITE MicroATX Mid Tower Case
Corsair CX650 650 W 80+ Bronze Certified ATX Power Supply
Windows 11

After powering on PC wont boot, fans spin rgb on GPU on everything seams fine but the screen stays black,
in this state PC cannot be powered off via the power button.
After cutting the power the PC boots without any issue, restarting sleep mode works fine.
Turning off the PC via start menu turns it off but again it cannot boot only after the power is cut.

What we tried:

latest bios (F3d),all cables are connected, all ports work, same issue with XMP on/off, no overclocks,
after the second boot: all temps are good, no crashes while stress testing.
We never encountered such issue before. Any ideas?

 

[hedwar2011]

1) Is the PC connected to a UPS (uninterruptible power supply)?
2) What do you mean by the power being "cut"? Are you unplugging it from the back?

 

[silsso]

1) Is the PC connected to a UPS (uninterruptible power supply)?
2) What do you mean by the power being "cut"? Are you unplugging it from the back?

1,No
2,Flipping the psu switch.
there is no other way to power the pc down long pressing the power button does not work, otherwise on the second boot it works fine, untill again the power needs to be cut so the PC can boot.
I know its very strange..

 

[hedwar2011]

1,No
2,Flipping the psu switch.
there is no other way to power the pc down long pressing the power button does not work, otherwise on the second boot it works fine, untill again the power needs to be cut so the PC can boot.
I know its very strange..

For kicks and giggles, power the PC off, pull all sources of power (unplug power cord from back), press and hold power button for 5-10 secs (to drain flea power), remove and then reseat the CMOS battery, reboot and see what happens.

 

[silsso]

For kicks and giggles, power the PC off, pull all sources of power (unplug power cord from back), press and hold power button for 5-10 secs (to drain flea power), remove and then reseat the CMOS battery, reboot and see what happens.

Sorry for the late reply the ovner off the pc was not avaible. After some trobleshooting it was the RAM that was the issue, it was a supported by the mobo and it worked perfectly in a different pc.
Thanks anyway for the help!

 

[hedwar2011]

Sorry for the late reply the ovner off the pc was not avaible. After some trobleshooting it was the RAM that was the issue, it was a supported by the mobo and it worked perfectly in a different pc.
Thanks anyway for the help!

Glad to hear it's resolved and functioning.