Question Can't access BIOS after disabling CSM to enable Secure Boot ?

[mraiman141]

So since I upgraded to Windows 11 I encounter a problem, especially when I want to play Valorant, it won't launch until I enable Secure Boot.

The thing is, to enable secure boot I have to disable CSM
When I disable CSM, it won't go to the BIOS (it won't display)

When I restart the computer without touching anything, Windows loads normally, not a blank screen or any other problems.
But, when I restart the computer while pressing F2 to go to BIOS, the monitor just went blank indefinitely (tried with HDMI and DP, with 1 and 2 monitor), as if I was in the BIOS but can't see it. I tested it a few times and it seems that the PC goes into BIOS without displaying anything.

I could reset the CMOS, it worked but that's not the point as my goal is to enable secure boot so I can play Valorant.

My specs:
Asrock AB350 PRO 4
Ryzen 5 5600
Sapphire Nitro RX 580 4 GB
DDR4 8x2 3600 mHz

Any ideas? Help
Thanks

 

[Darkbreeze]

What is the currently installed BIOS version?

 

[mraiman141]

What is the currently installed BIOS version?

L8.02 https://www.asrock.com/MB/AMD/AB350 Pro4/index.asp#BIOS

 

[Darkbreeze]

Have you tried doing a hard reset, EXACTLY as outlined below? If not, try that, first. Also, this is not an unknown problem. If you are using Displayport, try switching to HDMI at least until you make the needed changes in the BIOS. Unfortunately there may not be a permanent fix for this as none of the motherboard manufacturers have directly implemented fixes for the lack of BIOS screen on some older boards after disabling CSM. As noted here:

View: https://www.youtube.com/watch?v=BjBuLj_s7xQ




BIOS Hard Reset procedure

Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for about three to five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.

During that five minutes while the CMOS battery is out of the motherboard, press the power button on the case, continuously, for 15-30 seconds, in order to deplete any residual charge that might be present in the CMOS circuit. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP, A-XMP or D.O.C.P profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.

In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the BIOS to fully reset and force recreation of the hardware tables.