I just finished a repair on a system with a similar situation. It turned out to be a bad power supply. In my situation, the tower lights lit up, the fans all worked, and you could hear the hard drive begin to spin up. I could see the system begin to boot, as it would show the Bios information, then the monitor would go blank, and stop the boot progress. So...... even when it appears that the power supply is good, it may not have enough power for the system to operate. So, try a new power supply first, if you can. It is MUCH less to replace than the MotherBoard!!! Steve Wolfe > > > >Dzingai Chakazamba <[log in to unmask]> wrote: > >When I switched on my computer it would not start. At first I > >thought the power cable to the Hard Disk had slipped off, but this was not > >so. The PowerSupply fan and Processor cooler are working. There is not the > >"beep" of POST. I do not know what the matter is. Is it the Motherboard or > >BIOS chip. > > > >==What did you do between the time you switched the computer off the last > >time it was working and the time it would not boot? Anything? > Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://nospin.com - http://nospin.org