Enabling Secure Boot Results in Black Screen

Hi, I had the same problem as you, but I still continue to have the pc with a black screen.

So I wanted to ask you if buying a CPU with integrated video card, could it work. I was already planning to get it because by searching the internet many of them had solved the problem by using a CPU with integrated video card.

I wanted to ask you if you are sure that buying a CPU with an integrated video card could solve the problem. And after that if I could get into the bios what should I do, disable only secure boot, or update the bios completely.

PS

I also did all the prediminal steps you did, like resetting the CMOS.

And I also wanted to tell you to try using a feature that's available on gigabyte motherboards (granted it didn't work for me), check if there's a feature on your motherboard called Q_FLASH PLUS, basically it's based on updating the bios with the pc off and disassembled only with the motherboard with the 24 pin cable attached and the one for CPU power. I suggest you look into it, maybe it works for you.

Best

Riccardo

Your motherboard isnt broken.
I had the same issue today.

1.Unplug power from power supply

2. Remove graphic card
3. Remove CMOS battery (leave it for 5 min)
4. Connect your monitor via HDMI cable directy to the HDMI port in your motherboard
5. Put battery back on
6. Connect power to PSU
7. Turn on your PC
8. You can now enter bios and revert the changes you made

Please note that if you had your monitor plugged in via display port, you may first change the input in your monitor. At first, after i connected it via HDMI to fist the blank screen problem, it didnt work, but only because my monitor input was set to DISPLAY PORT instead of HDMI.

My motherboard: Gigabyte Aorus Z390 PRO WIFI

By the way, on the forums pleaople say that the blank screen is related to main drive being on MBR instead of GPT

MBR - master boot record

GPT - GUID Partition Table

W11 requires GPT partition.

Im wondering why installing W11 is so complicated, and nowhere i could find proper guide.

Hi There. I have dealt with this issue recently and apart from all the things we are doing there's one step that will give you the results you looking for.

Simply hold pwr + reset button after you removed the cmos battery operation, hold both for 10 seconds when you power up. It will restart about twice and it hopefully will bring back your gigabyte LOGO screen.

When it does do a optimized defaults then redo XMP profile for your ram and then go into windows. Then you can get to the real problem which is the gpu driver that you have to either roll back or update but you can do more research on it. This is a driver clash between gpu and bios. Basically when you power on the bios brain doesn't recognize the gpu as eyes so the bios don't send signal to eyes for vision hence you get no signal on screen. This is not a black screen issue... Wording is important. This is a no signal issue to monitor meaning the bios dont recognize gpu so protocol not sent.

I hope you find salvation in these methods... Sadly the trusted brands are failing us with their conflicting aoftware!!!

If anyone still having that issue on:

Gigabyte Aorus Z390 PRO WIFI

Update your bios first. That fixed the secure boot blank screen issue for me.

My bios verstion was F12c from 2019, after an update to F12 from 2021, i could change secure boot settings without any problems.

A possible solution to this issue is to connect to any monitor via a VGA cable (cheap from a local shop if you dont have one laying around). Some older flat screen LCD type TVs still support VGA so you might have one in a spare bedroom. (See the PTN at the bottom why not to use HDMI)

If you have an add-in graphics card (GPU), you can try plugging it in to that first (possibly need an adapter)

If that fails, try plugging the VGA in to the integrated slot and boot up - if you receive the message an addin graphics card was detected but not supported, you can assume the next option will work.

My Solution -

Remove the GPU from the PC (unplugging its power cable is not enough) and plug the VGA direct to the integrated GPU slot (can sometimes be behind a plastic guard).

On restart with the VGA plugged in, the screen displayed a message along the lines of - System didnt boot correctly, press F2 to enter BIOS and setup. From here you can change the secure boot setting back to OFF!! Make sure you save the changes before exiting!!

Continue to load up your PC and then shut down as normal - you should now be able to reinsert your GPU and plug back in all the original cables.

Point to note - for some strange reason,  my system would detect a HDMI was connected in the add in GPU slot and display a black screen (my display would change from the idle screen saver so I knew it was receiving some signal).  It wouldn't however receive signal from the integrated GPU HDMI slot so either way HDMI is a no!!