Hey all,
I made a build with B550m mortar wifi + Ryzen 5800x. It booted into bios on the first try, however, after reducing fan speeds in bios and saving the settings, the system stopped booting/posting. I get a red cpu debug led on.
Issue really seems to be bios related, so I have tried many things, including:
I have spent a crazy amount of hours reading up online and trying to fix the issue. At this point I am pretty much giving up and considering getting a replacement. Is my board faulty? Did I mess it up? Are there any other things I could try? Please help
I made a build with B550m mortar wifi + Ryzen 5800x. It booted into bios on the first try, however, after reducing fan speeds in bios and saving the settings, the system stopped booting/posting. I get a red cpu debug led on.
Issue really seems to be bios related, so I have tried many things, including:
- Resetting CMOS by removing the battery and disconnecting PSU cables for 10+ minutes. No effect.
- Resetting CMOS by shorting the JBAT1 pins. No effect.
- Flashing new BIOS through USB with all parts connected. This did not work, the Flash BIOS light keeps blinking fast forever (tried it for 30+ minutes, motherboard debug CPU light is red). System turns on a few seconds after pressing the flash bios button, all fans are spinning, but the process never ends.
- I removed all the components and only left the PSU connected to CPU and ATX power ports. Then tried flashing BIOS again. Now, the Flash BIOS light is blinking slow (3s intervals), but also seems to go on forever. There is no motherboard debug lights on.
- I got my hands on Ryzen 3900x and tried the same processes. System does not post, CPU debug led is still on when powering the system up. CPU fan does not turn on. Flash BIOS does not work - led is blinking slow and forever (left overnight, was still blinking in the morning)
- I tried 4-5 different USB drives (8/16GB), tried formatting with Windows format feature, as well as using Rufus and also on Mac. FAT32, MBR, seem to have tried all the suggested methods from various threads online.
- Also tried at least 4 different BIOS versions, makes no difference.
I have spent a crazy amount of hours reading up online and trying to fix the issue. At this point I am pretty much giving up and considering getting a replacement. Is my board faulty? Did I mess it up? Are there any other things I could try? Please help