- Jun 2, 2013
- 4
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- 10,510
Hi,
My computer has crashed, and this is an old (2yo) build, with no new upgrades made recently. It wouldn't boot, blamed PSU, but once I stared to investigate, I got strange results. Question is: is it PSU and MoBo or PSU and CPU what burned?
CPU Intel i7 2600
MoBo Asus P8P67
PSU CoolerMaster 700W RS-700-ASAA-A1 (the only part that is 5yo)
It just shut down on Friday evening, when I was working on it. No power surge/shortage as to my knowledge - no other appliances at home got reset or anyhow affected.
When I press power on button, fans on PSU, CPU move a little and stop. No peripherals (HDD, DVDRW) start to work, everything stays silent. My PSU has the PSU failure/protection triggered LED, it stays red (and that's indicating PSU is faulty), MoBo has also a LED indicating the power is connected to it, and MoBo LED is on.
I tried some things, so - power on switch is OK. CPU fan spins up, when connected directly to PSU.
U paperclip test (green-black wire connected) of PSU passed with fan, but system does not boot under load (HDD/DVDROM/graphics card). So I used my friend son's Corsair 700W, taken from working system.
The funny part is, the system powers up with PSU replaced with a god one, but ONLY with CPU power plug DISCONNECTED (just MoBo 24 pin power plug is connected).
It's Sunday, I need this computer ASAP for work. RMA would take weeks. So I would need to buy new components when waiting for RMA. And it makes a difference in my pocket whether I have to buy new PSU and MoBo or PSU and CPU, or worse - all three.
Please, advice on test that allows me to discover, whether (apart from PSU) MoBo is faulty or CPU is faulty. Maybe it's a CPU fan (it spins with 5v applied, and soldering looks good, but maybe tacho/rpm probe has broken and as a result CPU won't boot and stop other components from booting).
Please advice. I am a bit desperate now.
Michal
My computer has crashed, and this is an old (2yo) build, with no new upgrades made recently. It wouldn't boot, blamed PSU, but once I stared to investigate, I got strange results. Question is: is it PSU and MoBo or PSU and CPU what burned?
CPU Intel i7 2600
MoBo Asus P8P67
PSU CoolerMaster 700W RS-700-ASAA-A1 (the only part that is 5yo)
It just shut down on Friday evening, when I was working on it. No power surge/shortage as to my knowledge - no other appliances at home got reset or anyhow affected.
When I press power on button, fans on PSU, CPU move a little and stop. No peripherals (HDD, DVDRW) start to work, everything stays silent. My PSU has the PSU failure/protection triggered LED, it stays red (and that's indicating PSU is faulty), MoBo has also a LED indicating the power is connected to it, and MoBo LED is on.
I tried some things, so - power on switch is OK. CPU fan spins up, when connected directly to PSU.
U paperclip test (green-black wire connected) of PSU passed with fan, but system does not boot under load (HDD/DVDROM/graphics card). So I used my friend son's Corsair 700W, taken from working system.
The funny part is, the system powers up with PSU replaced with a god one, but ONLY with CPU power plug DISCONNECTED (just MoBo 24 pin power plug is connected).
It's Sunday, I need this computer ASAP for work. RMA would take weeks. So I would need to buy new components when waiting for RMA. And it makes a difference in my pocket whether I have to buy new PSU and MoBo or PSU and CPU, or worse - all three.
Please, advice on test that allows me to discover, whether (apart from PSU) MoBo is faulty or CPU is faulty. Maybe it's a CPU fan (it spins with 5v applied, and soldering looks good, but maybe tacho/rpm probe has broken and as a result CPU won't boot and stop other components from booting).
Please advice. I am a bit desperate now.
Michal
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