My system is self built, about six months old, and upto now has worked OK.
It comprises:- Asus P5Q deluxe motherboard Intel Core 2 E8500 Skt 775 4 GB RAM Saphire Radeon HD 4850 Soundblaster XiFi soundcard BeQuiet 650W power supply Vista 64 Home Premium
The problem - will not boot. Press the start button and all the fans start, hard disk spins up, but nothing else happens The only way I can boot it is to quickly switch the power off and on again, then it boots.
I have:- Done a repair install of Vista, no change. Updated the Bios, no change (but more below) Unplugged and re-installed all boards checking connections and leaving non-essential items not connected, no change removed the cmos battery to reset, no change
Since the BIOS update I now get a message "F1 to recover BIOS settings or F2 to load defaults" If I press F1 to change the BIOS, I cannot save the changes, because when I "save and exit" it powers down. If I "F2" to load defaults, it boots and loads Windows OK
Finally, today, in desperation, I installed Windows Service Pack 2, no change
Any help, suggestions, will be gratefully received.