I get an emachine T2778 (Athlon XP2700 based) PC to troubleshoot, doesnt fire up, no video, user replaced PS after someone told him it was probably dead. To be safe I go with a good Power supply, as soon as I plug it in, and throw the switch on the PS, the fan on the PS kicks on, but the pc doesnt boot. Weird, think maybe a power switch issue with the case, or a grounding issue. I remove the MB from the case, still does it. I remove the power switch connection to the MB, it still does it. Try a known good CPU in the board, still does it. At this point I figure the board is junk.
I inspect the original CPU, it looks ok, doesnt appear to be fried, so I throw it in a brand new MB. Put it back in the case, hook everything up, try to fire up to reinstall winXP, and the same thing is happening. Ive seen odd power issues before from a bad hard drive, so to be safe I unplug the HD, but same thing. I put in known good memory, known good cpu, and it still does the same thing.
At this point it appears the original CPU is bad, but also appears that it has caused the MB to go bad as well. I built the system back up using another new motherboard, a good cpu, the old memory, old case, old hard drive, old optical drives, and its working fine. But the new MB that I tried the old CPU in is still dead in the water, I tried leaving the cmos battery out overnight, but next day as soon as an atx power supply is plugged into it, and the switch on the PS is on, the PS fan starts up.
Was just wondering if anyone has run into a bad CPU that seems to kill MB's like this, im certainly not going to try it in any more boards.
thanks,
Dave
I inspect the original CPU, it looks ok, doesnt appear to be fried, so I throw it in a brand new MB. Put it back in the case, hook everything up, try to fire up to reinstall winXP, and the same thing is happening. Ive seen odd power issues before from a bad hard drive, so to be safe I unplug the HD, but same thing. I put in known good memory, known good cpu, and it still does the same thing.
At this point it appears the original CPU is bad, but also appears that it has caused the MB to go bad as well. I built the system back up using another new motherboard, a good cpu, the old memory, old case, old hard drive, old optical drives, and its working fine. But the new MB that I tried the old CPU in is still dead in the water, I tried leaving the cmos battery out overnight, but next day as soon as an atx power supply is plugged into it, and the switch on the PS is on, the PS fan starts up.
Was just wondering if anyone has run into a bad CPU that seems to kill MB's like this, im certainly not going to try it in any more boards.
thanks,
Dave
