Last computer was E-machine with AU31 motherboard, AMD Athlon 2800 processor. After 2 years operation, my son loses video while in use on-line. Video never came back even after hard boot. It also appeared that there is no longer any posting. When powering up, all fans (PSU & CPU) run and power LED is lit but that is about it. The monitor stays in standby mode (amber light) and is blank, there is no activity out of the hard drive (no boot), but I hear no alarm beeps from motherboard. I tried replacing hard drive. Same problem. I removed CMOS battery. Same problem. Stripped all devices from motherboard but PSU, CPU, Memory, & Monitor. Same problem. E-machine PSU was a Bestec model #ATX-250-12E. Tried one from an older comuputer, AGI model #HP-250NLXAK. Same problem.
Bought another computer but would like to get the E-machine running again. From reading a number of forums I figured the motherboard was bad. Couldn't come across the AU31 so purchase a very similar board, BIOSTAR M7NCG, from newegg. Swapped the M7NCG into the E-machine case in place of the AU31. Installed the AMD Athlon 2800 CPU from the E-machine using the conducting gel. Installed the Memory from the E-machine. Plugged in the Bestec PSU. Hooked up the monitor. Same problem. No video, no post, no beeps. Do I need to be doing something with the BIOS, but how as I do not get any video? Any suggestions?