Question Black screen after Secure Boot enabled and Legacy Boot disabled ?

[knownassa]

hello, Recently I changed some BIOS settings on my HP Z440 Workstation. I enabled Secure Boot and disabled Legacy Boot. But after doing that it beeped 5 times and shows a red light. After learning that this means a RAM issue I changed the slots, Now there is no beep or red light, everything looks normal. but there's no display output. I tried to reset cmos by removing the cmos battery, but no luck.

My CPU has a Quadro 4000 GPU. I tried every type of Cmos Reset but it didn't Help. So I am thinking using a RX 580 because I have 700Watt PSU.

 

[hedwar2011]

1) What led you to enable Secure Boot?
2) Was it working correctly before you enabled SecureBoot? Not all systems are designed to use it.

 

[knownassa]

1) What led you to enable Secure Boot?
2) Was it working correctly before you enabled SecureBoot? Not all systems are designed to use it.

I wanted to test Valorant which needed the Secure Boot Enabled. Before that the PC was working fine.
(Before that when I updated my Nvidia Driver for the Quadro 4000 from Windows optional updates, my screen went black when I booted into Windows, Safe Mode was also unstable but I fixed that by not Installing the update again).

 

[hedwar2011]

Turn SecureBoot back off and see if it boots normally again.

 

[knownassa]

Turn SecureBoot back off and see if it boots normally again.

The desktop is not showing any display output. I am unable to go to the Bios. Also Resetting CMOS button or removing the CMOS Battery, Nothing working.

 

[hedwar2011]

1) Make sure your display is on the correct input.
2) If you're connecting via DisplayPort, you have two different DisplayPort connections, try the other connection.
3) Try a different DP cable.
4) Try connecting a DVI cable and see if you get video.

 

[fouad911]

I have the same problem rn have you found any solutions?

 

[rgd1101]

other people have luck by removing the gpu or adding a new gpu

 

[knownassa]

other people have luck by removing the gpu or adding a new gpu

i am thinking getting a old gpu like gt 210 or 240 to check. I got a post similar to this problem. Just waiting to buy that.