Hi. This is the second time it happens. I basically press the power button on the PC, all the fans started and then they shut off. I've pressed it again. The fans started to spin for a few seconds but no POST or successful BOOT Beep. After 30 seconds or so the PC finally boots. It gets past POST and the it sais something like this "Bad bios checksum. Recovering from backup bios". After a couple of minutes the PC started as usual and now I'm writing for it.
Why is this happening?