When I plug in both the 20-pin and 4-pin connectors to the mobo and hit the power button, the lights flicker briefly and turn back off. When I have ONLY the 20-pin connector attached (ie, once I remove the 4-pin connector), the power supply will stay on (fan running).
I initially thought my power supply was dead but I bought a power supply tester and I have 2 working PSUs. I am nearly certain that this isn't a PSU problem -- I have 2 PSUs and the same thing happens with both. The only thing attached to the mobo are the CPU/HSF and PSU.
Yes, I went through the checklist -- reset CMOS, breadboarding, etc.
Is this a mobo problem? Or is my CPU dead? I've had overheating problems in the past. The last time my computer was on, it suddenly turned off, and the motherboard was very hot to the touch. It hasn't turned on since.
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System: (note that the problem occurs even when it's just CPU / HSF / PSU)
HD -- WD Caviar 500GB Serial ATA HD 7200/16MB/SATA-3G
Memory 1 -- Corsair XMS3 2048MB PC10600 DDR3 1333MHz (2x1024)
Memory 2 -- OCZ 2048MB PC10666 DDR3 1333MHz (2x1024MB)
Mobo -- MSI NF750-G55 nForce 750a SLI Socket AM3
Case -- Cooler Master Centurion 534 Blk Case
Video card -- Sparkle GeForce 9500 GT 512MB PCIe w/DVI
CPU -- AMD Phenom II X4 965 Black Edition Deneb 3.4GHz 4000MHz Socket AM3
PSU -- Antec EA-650 Power supply
I initially thought my power supply was dead but I bought a power supply tester and I have 2 working PSUs. I am nearly certain that this isn't a PSU problem -- I have 2 PSUs and the same thing happens with both. The only thing attached to the mobo are the CPU/HSF and PSU.
Yes, I went through the checklist -- reset CMOS, breadboarding, etc.
Is this a mobo problem? Or is my CPU dead? I've had overheating problems in the past. The last time my computer was on, it suddenly turned off, and the motherboard was very hot to the touch. It hasn't turned on since.
---
System: (note that the problem occurs even when it's just CPU / HSF / PSU)
HD -- WD Caviar 500GB Serial ATA HD 7200/16MB/SATA-3G
Memory 1 -- Corsair XMS3 2048MB PC10600 DDR3 1333MHz (2x1024)
Memory 2 -- OCZ 2048MB PC10666 DDR3 1333MHz (2x1024MB)
Mobo -- MSI NF750-G55 nForce 750a SLI Socket AM3
Case -- Cooler Master Centurion 534 Blk Case
Video card -- Sparkle GeForce 9500 GT 512MB PCIe w/DVI
CPU -- AMD Phenom II X4 965 Black Edition Deneb 3.4GHz 4000MHz Socket AM3
PSU -- Antec EA-650 Power supply