I hate to admit this but I am stomped!!! One of the computers stopped working and I think I have pretty much done everything I can to get it going again.....:devious: Pentium IV Celeron processor not overclocked running with 512mb ram (PC2700) on an Asus P4S533X motherboard. Nvidia 64mb video board MX400 I think it is. Pretty much standard system with a CDRW and 120gb hdd (WD) My daughter complained that the computer would not turn on every morning and she had to restart the system by unplugging the cord and reinserting it. Not something I want a child to do to get a computer going. Come to find out that there is an issue, it seems that something is shorting out. System has a switching power supply so after turning it off and on with the little switch the fan of the CPU seems to turn just a little. The hard disk makes an attempt to boot but never gets enough power. So after stripping everything from the mainboard and only the video board installed and the power to the motherboard of course (power to all other devices removed) I turn the system on. At first it boots into the bios, compaining that the system crashed during previous boot. Setting the CPU to the right speed and restarting the system...... NADA nothing! Hmmm... power supply bad? Not enough juice to the motherboard... Power Supply replaced with brand new one. Same deal! Hmmm something shorted out on the motherboard? Motherboard replaced with Asus P4S800..... seemed to work! Yes Seemed! Back to the same issue even with the new equipment..... WTH? Now I am thinking that it might be the power switch on the case, as that is the only thing I have not replaced yet..... Testing has always been done with the same case but could this be possible? I even got a UPS hooked up to the system to make sure I got clean hydro. What about a CPU this on is 19 months old? I am baffled! Anyone?