The black screen and RAM debug indicator have switched to the VGA debug light permanently.
The black screen and RAM debug indicator have switched to the VGA debug light permanently.
Mobo: Aorus B450 Pro
GPU: Aorus Radeon Rx 580
CPU: Ryzen 5 2600
2x8 Gb G.Skill Aegis DDR4
Hello everyone,
I had to repair the PC of my girlfriend. I planned to upgrade the BIOS from f4 to f65. I did it gradually because another user faced issues with the same mainboard jumping straight to the latest version. I followed the steps: f4-f32-f40-f61-f65.
I updated the BIOS through the App Center, and it worked perfectly before. The first attempt was smooth until f61 when a black screen appeared. After some time, I powered off the PC and restarted it; it returned to f4. It seemed like something had failed and loaded the backup BIOS.
I retried, this time at f61 without problems, and successfully updated to f65. However, a black screen reappeared. Restarting didn’t resolve the issue.
Initially, the CPU debug light was lit but changed to VGA mode. I removed the GPU and reinstalled it. Everything functioned normally before the BIOS update, so I suspected the main BIOS was faulty and needed a backup. I shorted the CMOS pins, then removed the CMOS battery for a few minutes before reinserting it.
After that, the PC passed the POST and initially emitted a long and three short beeps, which seemed normal since the VGA debug light was on. Later, after removing the CMOS battery again, only one short beep appeared. I removed the RAM and reinstalled it, but the issue persisted with the same debug light and BIOS sound.
At this stage, I have no clear next steps. I’ve tested every RAM slot, but nothing helped, and I’m unsure why the BIOS sound changed.
In summary: when starting the PC, fans and RGB lights activate, the RAM debug light flashes briefly before jumping to CPU and then back to RAM after about a minute. Once the Aorus logo appears, it switches to VGA mode and stays there, producing a single short beep. It also emits some signals, possibly indicating monitor input, but the display remains black.
did you link the GPU to the monitor instead of the motherboard?
to access the backup BIOS:
1. turn off the system and disconnect the power cable from the PSU, then press the power button for roughly 10 seconds
2. restart the PSU and keep pressing the power button until the PC completely shuts down again
3. press the power button; the PC will boot up and the backup BIOS will transfer itself to the main chip before rebooting automatically
cmos jumper remains unset while attempting to boot?
avoid using Windows tools for BIOS updates
After disconnecting and pressing the power button for ten seconds, I reconnected it and held the power button for several minutes. During this period the fans spun at high speeds and the CPU debug light remained on continuously. After three to five minutes I released the power button and the VGA began to glow followed by a short beep. When I pressed the power button again for an extended duration, it emitted a loud sound. I turned it back on, and the main difference was that instead of one minute it took only a few seconds for the short beep and the VGA debug light to appear.
Do You mean instantly? Switching it on and off quickly, just a few times or should I let him attempt to boot and shut down after the beep and no image, repeatedly? If this happens back to back, Mather…I’ve started and stopped it many times since yesterday.
Power on, pause for one second, then turn off the PSU.
Did you possibly swap the CPU 2600 for a newer model?
Alternatively, you might consider swapping both BIOS chips.
Watch: https://www.youtube.com/watch?v=bOPQAaLlOWA