You wrote===I just switched off the computer and when I switched it on the next day it would not start. I don't know if anyone did anything to it while I was away.== Remove all peripherals [cards, cables, connections to hd and floppies [[first the power connections then the 'ribbon']] piece by piece, switching the machine on and off with each removal. When everything is out and you still don't have a start, check the power output of transformer [see other earlier post for directions or voltages]. If no voltage, it's your transformer, if you have voltage and the connectors to the mobo from the transformer are correct [I'm not sure but I think there should be matching colors at the center of the two connectors-I recall they are black], it is likely a motherboard problem, but I would be conservative in making this final conclusion until I had taken everything out and put it all back from scratch. In my experience a lot of unncessary parts are replaced in this day of easy swap in and out. AM ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://nospin.com - http://nospin.org