I saw there was a new Bios out. I updated it, all went well. Said I needed to restart. When it rebooted I lost video signal and the RAM RGB went off. I get a yellow light and a C5 error message. Not sure what I'm meant to do? I tried reseting cmos and then flash back to the latest firmware which I still had on USB.
Edit: Reseating ram sorted it out. Phew.