PC Wont POST after enabling secure boot

[Acrazedhobo]

Good Morning all,

 

A bit of backstory, I installed Valorant on my PC for my younger brother to play. The game wouldn't boot citing it requires 'Secure boot' to be enabled.

 

I accessed my BIOS and enabled secure boot, restarted my PC and attempted to launch Valorant, the same message popped up. 

 

I re-accessed my BIOS and saw that secure boot was enabled but 'not active' (I cannot remember the exact phrasing). I remember seeing that I needed to generate a key of some sort. My first mistake, I rushed through playing with BIOS settings without understanding what they do. 

 

After ensuring that secure boot was enabled and a key generated, I saved my settings and restarted my PC. The PC switched on but didn't post, just a black screen. I waited 5 - 10 minutes and nothing was happening - here comes my second mistake. I got impatient and forcefully switched off my computer. Now the PC switches on but I get a 'No signal' message on my monitor and it never POSTs.

 

Solutions Attempted - After reading the stickied thread "How to respond to a no POST or no power up situation"

• Cleared CMOS by taking CMOS battery out of motherboard and waiting 20 minutes.
• Reseated RAM (Didn't reseat CPU as it is connected to a liquid cooler and the PC was working fine up until I was an idiot in the BIOS).
• Boot with no drives connected to the motherboard.
• Boot with no peripherals connected to the motherboard
• Boot with only the CPU and one stick of RAM connected to the motherboard.

 

Any advice would be greatly appreciated, thank you!

 

System Config

Windows 11

Ryzen 7 5800X

RTX 3070

32GB Corsair 3200 DDR4

1TB Corsair NVME SSD (Boot drive)

500GB Crucial BX500

[Isuck Assimov]

what you want to do there is enable secure boot, then restore factory keys, then install your OS.

afaik enabling secure boot after installing a OS when secure boot was disabled doesn't give you the full protection but i might be wrong on that.

Did you try to take out your GPU and use the mainboard graphics output ?

BIOS still doesn't seem to have been reset after your forced shutdown, try booting a couple times and shutting your PC off via keeping the power button pressed multiple times while its trying to boot. Ususaly after a few failed attempts your BIOS should reset to defaults on its own.

[Acrazedhobo]

4 hours ago, Isuck Assimov said:

what you want to do there is enable secure boot, then restore factory keys, then install your OS.

afaik enabling secure boot after installing a OS when secure boot was disabled doesn't give you the full protection but i might be wrong on that.

Did you try to take out your GPU and use the mainboard graphics output ?

BIOS still doesn't seem to have been reset after your forced shutdown, try booting a couple times and shutting your PC off via keeping the power button pressed multiple times while its trying to boot. Ususaly after a few failed attempts your BIOS should reset to defaults on its own.

Thanks for you reply, unfortunatley my 5800X doesnt have on board graphics, i have tried connecting an HDMI & DP cable to my motherboard just in case but nothing. I attempted the multiple restarts buy holding the power button but to no success also. I appreciate your suggestions, thanks again!

[Whatisthis]

Enabling secure boot has been known to soft brick your motherboard…happened to me except I could never get it to work again. It wouldn’t respond to power button at all. I went as far as manually shorting pins on the bios chip to force it to use the backup bios but nothing worked.

 

Are you getting any life when you press power? Like fans turning on and peripherals getting power?

Try taking out all components except cpu and booting it. The hardware change might make the board revive. If you get a ram error, plug the ram and gpu back in.

 

Some people have revived their boards by flashing bios. If your board has a usb bios flash port, that might work.

 

sorry you’re going through this.

[Bjoolz]

4 hours ago, Acrazedhobo said:

Thanks for you reply, unfortunatley my 5800X doesnt have on board graphics, i have tried connecting an HDMI & DP cable to my motherboard just in case but nothing. I attempted the multiple restarts buy holding the power button but to no success also. I appreciate your suggestions, thanks again!

If it powers on, I have seen people rescue this by using a different GPU to disable Secure Boot, plug the old GPU back in and try again. It seems that in some cases enabling Secure Boot locks out the  current GPU for some unknown reason.