last night I tried to switch on my HP PC and nothing happened - the power comes on for a few seconds then turns off and goes into an endless on/off loop. I tried disconnecting the power cord with no luck, then opened the cover and disconnected the power connections to the devices to see if that helped - again with no result. If I disconnect power to the motherboard the PC power stays on, but that obviously doesn't help! I haven't installed any new devices lately and the PC has been runnign fine until this (apart from a video card failure a few months ago). where do I go from here? Clear the CMOS and try that?
I'd try booting into Safe Mode (F8) and then uninstall Norton Internet Security (if your subscription already expired) reboot back into Safe Mode and then try running System Restore to a previous date/time where the system was working fine. Good luck.
Thanks for all the suggestions. I could not boot into safe mode as the PC never got that far. Using advice I found on another forum I switched the jumber to clear the CMOS and then switched it all back on again. All is working fine again now... Strange.
Our computer is doing exactly the same thing, continues to power cycle but will not boot, and can only be shut down by unplugging. I did try replacing the power supply today, but that did nothing. Would you please tell me how to fix the problem. I do not know how to clear the CMOS. Thanks!