I'm experiencing an issue where my PC displays a black screen after I enabled Secure Boot, which switched to custom mode. My computer powers on—the lights and fans are working—but my mouse and keyboard are unresponsive. I've tried a few troubleshooting steps: I removed the CMOS battery for about half an hour and touched the prongs for five minutes, but that didn't help. I've also switched the HDMI cable to the motherboard instead of my GPU, but still no display. Additionally, I removed both RAM sticks and tried them individually. Everything was updated—the drivers and BIOS—just a week ago. I know there's a method involving a dedicated USB for Q Flash on the motherboard, but I haven't tried that due to uncertainty on how it works. Here are my specs: CPU - AMD Ryzen 5 3600, GPU - AMD Radeon RX 5600 XT, Motherboard - Gigabyte B450M DS3H.
2 Answers
Did this problem start right after you enabled Secure Boot? If so, retracing your steps could help. Reverting the BIOS settings or attempting to reset the BIOS entirely could be worth a shot! You might have to get creative if a USB for Q Flash isn't available, but I'd try getting in touch with someone who might be able to assist you in manually updating the BIOS.
It sounds like you've run into a common issue after enabling Secure Boot, especially on Gigabyte and MSI boards. If everything was fine before, Secure Boot might've caused some conflicts. Many users reported that updating the BIOS helped, but since your motherboard doesn’t support BIOS flashback, that’s a bit tricky. Unfortunately, without integrated graphics on your CPU, connecting the monitor to the motherboard won’t help. You might need to take it to a repair shop where they can use an EEPROM programmer to overwrite the BIOS directly.
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