My PC has started rebooting itself in a continuous loop just after the Post screen. Sometimes I can't get it working for a day or two, then randomly it will work and everything will be fine. It's like every time I turn it off, it won't turn back on succesfully...I'll have to wait a day and then it will either boot successfully or continue rebooting itself in a never-ending loop (which forces me to hold in the power button for 4secs and try again later). So I took it to some IT guys and they reckon the Mobo is ruined and i gotta buy a new one... The problem started when I added another 2GB of RAM to my system. Obviously it looks like the new RAM is at fault, but I've tried using just the old RAM and the rebooting problem persists! Based on my specs, could anyone suggest what could be causing the problem? Has the new RAM caused irreparable damage? Could simple BIOS settings fix it? I really don't know where to start. I've read about people changing BIOS settings depending on their RAM, CPU etc. But I've always just set the BIOS to 'Fail-safe defaults'...Is that a bad idea and the cause of my problem? Any help is appreciated.