Thanks for the reply. The power supply make is Antec and is called a "true Power 550". 550 watts. It is about 6 years old. After numerous days of this happening and when it finally starts, I always get a message that the computer is now in Safe Mode and to push F1 to start. (probably from the numerous starting and shutting off sends it into Safe Mode??) F1 starts it and it continues to run, very very stable. It reminds me of the Energizer Bunny, it just keeps going!. At first I also thought maybe the cmos battery has finally given up the ghost and so I installed a brand new fresh one. The problems continue. I have given the PS a smell test, it seems normal. Unplugged and inspected all power connectors, they look good, nothing burnt etc. If only I had a 6-8 channel oscope with memory, I could watch the boot up, the voltages etc and see what is happening but I don't. It is interesting about draining the mother board. This computer is connected to a UPS, and even though the computer is shut down, the computer has a digital display on the MB that reads "99" in the shut down mode, and the router reads the lan card as connected always. If this is a problem that has manifested itself in the last month or so, I will start turning the ups off and see what happens even thought it has been connected this way for years.