So I upgraded my PC today. Bought an i5 3450 + an ASUS P8B75-M motherboard, along with two sticks of 4 Gb Memory.
I come home, uninstall my old motherboard and plug in the new stuff. No problems (other than Windows 7 not finding the ethernet drivers for the new mobo).
This is where it gets weird. After a few restarts (required for the drivers) the computer all of a sudden just dies. Completely. Won't react to power button nor to manual shorts with a pair of small tweezers - only indication that the PSU is actually working is that the mobo LED is shining a bright green solid light.
So, hoping that it's still the PSU, I plug in my old motherboard again (or rather, just connect the power cords - both 24 pin and 8 pin) and try starting that one by shorting the power supply and it works.
Frustrated I plug the power cords back into the new motherboard and lo and behold, it starts when I'm shorting the power supply pins. I happily, though a bit worried, add USB-drives and ethernet cable to the computer, installing ethernet drivers from the USB-drive. It all works fine and while I'm sitting at another computer, the upgraded one suddenly dies. No restart possible (neither power button nor shorting works).
I try the old one again, and it works, try the new one again, doesn't work.
I've tried everything now. I've dismounted the motherboard and tried dry starting it on flat surface with just the PSU connected - no luck. Tried same procedure with old one, works like a charm.
I can't figure out what might be wrong here.. could it be the PSU after all? That it can't handle a slightly more powerful CPU/Mobo? But wouldn't at least the fans start up for a brief moment and then die? To any experts, does it sound as if the CPU might be improperly seated? (I tried reseating it, no luck). Could something be wrong with the motherboard/CPU? The green light does shine indicating it's got power, but nothing happens - not even beeps.
Case is an Antec Sonata from 2006 with a mounted PSU (500 W). Old mobo and CPU was from 2007, so it's not nearly as requiring as the new stuff.
Any advice would be appreciated. I'm kind of frustrated now. Thanks in advance.
I come home, uninstall my old motherboard and plug in the new stuff. No problems (other than Windows 7 not finding the ethernet drivers for the new mobo).
This is where it gets weird. After a few restarts (required for the drivers) the computer all of a sudden just dies. Completely. Won't react to power button nor to manual shorts with a pair of small tweezers - only indication that the PSU is actually working is that the mobo LED is shining a bright green solid light.
So, hoping that it's still the PSU, I plug in my old motherboard again (or rather, just connect the power cords - both 24 pin and 8 pin) and try starting that one by shorting the power supply and it works.
Frustrated I plug the power cords back into the new motherboard and lo and behold, it starts when I'm shorting the power supply pins. I happily, though a bit worried, add USB-drives and ethernet cable to the computer, installing ethernet drivers from the USB-drive. It all works fine and while I'm sitting at another computer, the upgraded one suddenly dies. No restart possible (neither power button nor shorting works).
I try the old one again, and it works, try the new one again, doesn't work.
I've tried everything now. I've dismounted the motherboard and tried dry starting it on flat surface with just the PSU connected - no luck. Tried same procedure with old one, works like a charm.
I can't figure out what might be wrong here.. could it be the PSU after all? That it can't handle a slightly more powerful CPU/Mobo? But wouldn't at least the fans start up for a brief moment and then die? To any experts, does it sound as if the CPU might be improperly seated? (I tried reseating it, no luck). Could something be wrong with the motherboard/CPU? The green light does shine indicating it's got power, but nothing happens - not even beeps.
Case is an Antec Sonata from 2006 with a mounted PSU (500 W). Old mobo and CPU was from 2007, so it's not nearly as requiring as the new stuff.
Any advice would be appreciated. I'm kind of frustrated now. Thanks in advance.