Question ASRock B360 Pro4 failed to POST after Secure Boot was enabled ?

[drahmadi41]

Hi all,

I have a desktop PC with this specification

• Intel Core i7-8700 (CPU)
• ASRock B360 Pro4 (Motherboard)
• 4x GEIL DDR4 EVO POTENZA (RAM)
• MSI GeForce RTX 3060 GAMING X 12G (GPU)
• ADATA SX8200PRO 512GB M.2 (SSD)
• Seasonic Focus Gold GX-650 - 650W (PSU)
• Windows 11 (OS)

Recently I enabled Secure Boot on my desktop through accessing BIOS setup menu due to a game (FIFA 23), before then it was disabled and the PC was working perfectly. After I enabled the Secure Boot, the PC won't POST. By "won't POST", I mean that :

• The PC won't show the ASRock logo during start (and I am unable to access the BIOS setup menu again)
• My keyboard RGB light won't turned on. Usually when the PC managed to POST (and I am able to enter the BIOS setup menu by pressing F2/DEL), the light will turned on.
• My monitor just keep showing nothing, black.

I have tried to fix it by :

• Removing all of the SSD/HDD installed, then turning the PC on (hoping it would able to enter BIOS setup menu)
• Clearing the CMOS by moving the jumper
• Removing the CMOS battery, wait for several minutes, then install the battery and trying to turn on the PC
• Following the step mentioned on --> https://forum.asrock.com/forum_posts.asp?TID=630&title=how-to-clear-cmos-via-battery-removal for fixing any BIOS value corruption
• Turning on the PC without the GPU installed and connect the monitor through HDMI port on the motherboard

All of that result in nothing. The PC still won't POST and the monitors keep showing nothing (black). I have also checked that my SSD (the one where the OS installed) is on GPT format.

Can anyone help me, please? Thank you

 

[kerberos_20]

plug your monitor to mainboard, in some cases there are compatibility issues between uefi and gpu firmware, which usualy ends up switching to integrated gpu as first video output

plug monitor to mainboard, then go to bios, then switch gpu order to PEG1, then save bios changes and turn off pc, reconnect monitor with gpu and see if you get picture
if not picture then uefi bios and/or gpu vbios update is needed

 

[drahmadi41]

plug your monitor to mainboard, in some cases there are compatibility issues between uefi and gpu firmware, which usualy ends up switching to integrated gpu as first video output

plug monitor to mainboard, then go to bios, then switch gpu order to PEG1, then save bios changes and turn off pc, reconnect monitor with gpu and see if you get picture
if not picture then uefi bios and/or gpu vbios update is needed

Hi kerberos_20, thank you for the suggestion.

I have tried to connect my monitor directly through to mainboard via HDMI, nothing showed up (monitor still display nothing, just black).

How can I update the UEFI BIOS or GPU VBIOS if I am unable to access the BIOS setup menu? The ASRock logo which usually appears at the start, did not even show.