Question PC/Display gives no signal after changing settings in BIOS

Aug 9, 2025
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Hello,

So I wanted to run the BF6 BETA and it required me to change to secure boot to on. I opened my BIOS and saw it was already on, I pressed key management and it showed succes. After that I wanted to turn secure boot off (to turn it back on again), however my PC screen went black and nothing happened. See below a list of my Motherboard and what I tried to fix this.

Motherboard is a GIGABYTE Z590D.

1. I tried to bridge the CMOS pins, after that still no signal.
2. I removed my GPU and removed the battery and put it back 5 minutes later. Still no signal.
3. I tried removing 1 ram stick and switching them, but of that didn't work. Still no signal.
4. I did a reset using my power on button (turn on, hold power button to turn off, 3 times, 4th try let it run). Still no signal.
5. I don't have integrated graphics, using a i7 10700KF.
6. Tried to Qflash with USB 3.0, but the qflash button didn't light up, I ordered a 2.0 32gb usb stick to try it again. Since only 2.0 seems to work well.

So when I turn my PC on, everything goes well. Fans start spinning, led lights turn on, keyboard lights turn on etc. My motherboard has these lights to see where the issue is, the red light stays on VGA.
Since I changed the BIOS settings with secure boot and I have no signal, it is logic that the VGA light is on, since no display is popping up (no post). The issue is not the PSU or other components, since everything worked well before I changed this in the BIOS.

Are there any other things I can try? I am going to wait for my USB 2.0 to arrive to try the qflash. But there are probably people here that know better. Is there anything else I can do?
 
Welcome to the forums, newcomer!

1. I tried to bridge the CMOS pins, after that still no signal.
+
2. I removed my GPU and removed the battery and put it back 5 minutes later. Still no signal.
+
4. I did a reset using my power on button (turn on, hold power button to turn off, 3 times, 4th try let it run). Still no signal.
In order to clear the CMOS, users are advised to disconnect from the wall and display, then remove the CMOS battery, press and hold down the power button for 30secs to drain any residual power then reseat the CMOS battery after 30mins.

Motherboard is a GIGABYTE Z590D.
Is this;
https://www.gigabyte.com/Motherboard/Z590-D-rev-10
the motherboard you're working with?
+
5. I don't have integrated graphics, using a i7 10700KF.
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

My motherboard has these lights to see where the issue is, the red light stays on VGA.
That might be an indication that your slot might be compromised or the motherboard's BIOS has ended up corrupt or the PSU is having issues delivering power to the GPU.

The issue is not the PSU or other components, since everything worked well before I changed this in the BIOS.
Anything in the world of electronics can see an abrupt end to it's tenure. In your instance, the PSU could be one of the culprits. Time as well as stress on a PSU can degrade it over time, apart from high temps, perhaps it was on it's way out. Source(borrow, not buy) a reliably built PSU with more power than the entire platform needs to rule out your PSU as the issue.
 
Welcome to the forums, newcomer!

1. I tried to bridge the CMOS pins, after that still no signal.
+
2. I removed my GPU and removed the battery and put it back 5 minutes later. Still no signal.
+
4. I did a reset using my power on button (turn on, hold power button to turn off, 3 times, 4th try let it run). Still no signal.
In order to clear the CMOS, users are advised to disconnect from the wall and display, then remove the CMOS battery, press and hold down the power button for 30secs to drain any residual power then reseat the CMOS battery after 30mins.

Motherboard is a GIGABYTE Z590D.
Is this;
https://www.gigabyte.com/Motherboard/Z590-D-rev-10
the motherboard you're working with?
+
5. I don't have integrated graphics, using a i7 10700KF.
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

My motherboard has these lights to see where the issue is, the red light stays on VGA.
That might be an indication that your slot might be compromised or the motherboard's BIOS has ended up corrupt or the PSU is having issues delivering power to the GPU.

The issue is not the PSU or other components, since everything worked well before I changed this in the BIOS.
Anything in the world of electronics can see an abrupt end to it's tenure. In your instance, the PSU could be one of the culprits. Time as well as stress on a PSU can degrade it over time, apart from high temps, perhaps it was on it's way out. Source(borrow, not buy) a reliably built PSU with more power than the entire platform needs to rule out your PSU as the issue.
Thanks for your reply. Here is a list of all the components:

CPU: i7 10700KF
CPU cooler: Dragon Firebreather catch IT 240 (Looks like custom made).
Motherboard: GIGABYTE Z590D, yes the one you sent
Ram: Patriot Memory 16GB DDR4 3400Mhz
SSD/HDD: 1TB Samsung QVO 860 3D NAND SSD
GPU: MSI Geforce RTX 3060 12GB GDDR6
PSU: xilence xp700 700w (Since I bought it 2021)
Chassis: I only can't remember this
OS: I think I was running Windows 11 or 10 64 bit
Monitor: Asus Tuf VG24VQE 165hz

I tried to keep the CMOS battery out for longer than 30 minutes. Tried to turn it, it blinked past all the lights (even VGA turned off and went to boot), but after that it went back to VGA.

I tried using the Qflash using bios version F10, I don't know the current version I have. I convert my usb 2.0 to mbr, fat32, downloaded the bios and changed the name of the f10 file to GIGABYTE.bin. I put the usb is in the bios port, pressed the qflash button on bottom of mobo, nothing happened (tried pressing it once and holding it for 3-5 seconds).

The thing is, I didn't have any issues before I changed this setting in the bios, would be a biq coincidence if something happened to my psu in between. But I just don't know what to do at this point anymore. I can't source any PSU around me, so I can only go to a repair shop where they can test each component on a test bench.
 
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