Hello,
I have an e-machine T2984 that died recently. I simply turned the system off three weeks ago and it never turned on again. Looking inside the case, the motherboard shows a lit green led but the system doesn’t energize. Looking on the web, this is a popular problem with this model of system. Other owners attributed this problem to a bad motherboard. I tested by power supply by shorting the green power connector wire to ground and the power supply fan spins and the CDROM and HD energize. I suspect that I have a good power supply. So, I replaced my mobo with a Biostar P4M80-M4. This board should be a drop-in replacement for my previous board.
After replacing the mobo and energizing the system the CPU and case fans come on but I get no display. I have to hold the power button in for two or three seconds to get the system to power back down. I replaced the CPU (3Ghz Celeron) with another CPU (3Ghz P4) with the same results. I also tried different RAM (2 sticks of 512Mb PC-2700) and installed a 3rd party video card (PCI GeForce 6200 and PCI ATI Rage 128). All tests result in spinning fans and no display.
So, I replaced the Biostart mobo with another of the same model. This mobo is having the exact same problem. Again, I performed all of the same testing; replacing the cpu, replacing and moving memory, and installing a 3rd party video card.
Again, to rule out the power supply I tested it by shorting the green power connector wire to ground. The power supply fan does spin up and the CDROM and HD energize. I don't have another system to test the power supply in but I suspect that it's in good condition.
I've been double checking that the 20-Pin and 4-Pin cables are connected to the motherboard and that the CPU and case fans are plugged in. When swapping out the CPUs I make extra sure that the CPU is seated correctly and that there's a proper amount of thermal paste between the CPU and heatsync.
What am I missing? I find it highly unlikely that both CPUs are bad, both motherboards are bad, both video cards are bad, or that both DIMMs are bad. I've tried resetting the BIOS jumper on both boards and I've re-installed both boards in the case to make sure I didn't short it out.
I could really use a hand.
Thanks in advance,
Rob
I have an e-machine T2984 that died recently. I simply turned the system off three weeks ago and it never turned on again. Looking inside the case, the motherboard shows a lit green led but the system doesn’t energize. Looking on the web, this is a popular problem with this model of system. Other owners attributed this problem to a bad motherboard. I tested by power supply by shorting the green power connector wire to ground and the power supply fan spins and the CDROM and HD energize. I suspect that I have a good power supply. So, I replaced my mobo with a Biostar P4M80-M4. This board should be a drop-in replacement for my previous board.
After replacing the mobo and energizing the system the CPU and case fans come on but I get no display. I have to hold the power button in for two or three seconds to get the system to power back down. I replaced the CPU (3Ghz Celeron) with another CPU (3Ghz P4) with the same results. I also tried different RAM (2 sticks of 512Mb PC-2700) and installed a 3rd party video card (PCI GeForce 6200 and PCI ATI Rage 128). All tests result in spinning fans and no display.
So, I replaced the Biostart mobo with another of the same model. This mobo is having the exact same problem. Again, I performed all of the same testing; replacing the cpu, replacing and moving memory, and installing a 3rd party video card.
Again, to rule out the power supply I tested it by shorting the green power connector wire to ground. The power supply fan does spin up and the CDROM and HD energize. I don't have another system to test the power supply in but I suspect that it's in good condition.
I've been double checking that the 20-Pin and 4-Pin cables are connected to the motherboard and that the CPU and case fans are plugged in. When swapping out the CPUs I make extra sure that the CPU is seated correctly and that there's a proper amount of thermal paste between the CPU and heatsync.
What am I missing? I find it highly unlikely that both CPUs are bad, both motherboards are bad, both video cards are bad, or that both DIMMs are bad. I've tried resetting the BIOS jumper on both boards and I've re-installed both boards in the case to make sure I didn't short it out.
I could really use a hand.
Thanks in advance,
Rob