[SOLVED] Can't boot after disabling CSM

[PrastistroN]

I was trying to change my system from legacy into UEFI, and I found that to change it in my BIOS was to disable CSM in Boot option.

And sadly, I didn't convert my MBR SSD into GPT beforehand.

Now I'm stuck in the POST screen without booting, and I can't even enter UEFI setup to revert the CSM to enabled.

Tried resetting the CMOS jumper and pulling out the video card but no joy. Still stuck.

Can anyone please help?

Specs:
ASRock B450M Fatal1ty ITX/ac bios v3.40
AMD Ryzen 3 2200G
GSkill Ripjaws V
Sapphire Pulse RX570 ITX 4GB
Corsair SF600

 

[rgd1101]

so no screen to bios?

 

[PrastistroN]

so no screen to bios?

Can't enter bios/uefi at all, but the logo is there

 

[rgd1101]

what exactly do you mean can't enter bios/uefi? keyboard not working? error crash?
try unplug storage to get into it?

 

[PrastistroN]

what exactly do you mean can't enter bios/uefi? keyboard not working? error crash?
try unplug storage to get into it?

Not sure, but I'm unable to get into bios setup after POST, tried pressing F2+Del so many times it still stuck. I'm sure it's not a keyboard problem either.


Haven't tried unplugging storage, but I will definitely try, starting by removing the HDD first

 

[revodo]

Try removing the CMOS battery, waiting a few minutes (or a few seconds, I just go for the extreme to be sure), reinserting it, and starting back up.

 

[SkyNetRising]

I'm unable to get into bios setup after POST, tried pressing F2+Del so many times it still stuck. I'm sure it's not a keyboard problem either.

F2+Del ?
Press Del only ( you have to start spamming it immediately after power button is pressed ).

 

[ITSUPPORT25]

See the below link and your problem will be solved

View: https://youtu.be/PbyB-drELXE


Solution - see the time slot of 7:30 to 8:30

Follow the steps and enjoy.