PC won't boot (Motherboard, CPU or PS?)

August 16, 2011 at 21:54:58
Specs: Windows 7 SP1, AMD Phenom Black/16GB
I just had my PC die on me today that's been running for about a year and a half. I am trying to determine which component has failed. I checked the video card in another PC to confirm it works, as well as the RAM, so I am fairly certain it's a motherboard, power supply, or CPU issue.

It happened when I went to reboot the PC. I got the usual Windows screens but where the PC usually would have begun booting again, it just hung there. The DVD drive was having a bit of fit and the LED on the front of it was blinking and the drive sounded like it was trying to read or spin up. Also, the power and HDD activity lights on the front of the case were sporadically blinking in sync with no real rhythm. Holding in the power button in an attempt to power off the PC had no effect. I had to hit the power switch rocker on the back of the PC.

Now when I attempt to power on the PC, the LED light on my Motherboard is on, and both the CPU and case fans are operational, but the system does not boot. There are no beeps of any sort. The DVD drive does not respond to the eject button, and the power and HDD LEDs on the front of the case are still blinking sporadically.

I'll do my best to post the specs but I don't have the PC here with me. The power supply is 600W. The CPU I believe is an AMD Phemon II 945 Quad-Core. The video card is an NVIDIA GTX260. The primary hard drive is an Intel SSD, and the secondary hard drive is a 7200RPM SATA drive.

I don't have a motherboard with a compatible socket around to test the CPU, so I am just trying to limit the scope of the problem. I think I have a power supply that I will try tomorrow. Thanks in advance for any pointers!

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August 17, 2011 at 05:09:27
"The power supply is 600W"

That's of little use. How about a make/model?

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August 17, 2011 at 08:43:36
Here are most of the components. I don't have the power supply specs as of now but will post them later today.

1 x ASUS M4A79XTD EVO AM3 AMD 790X ATX AMD Motherboard

1 x AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor

1 x Intel X25-E 64GB 2.5" SATA II SLC Enterprise Solid State Disk

1 x G.SKILL Ripjaws Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9Q-16GBRL

1 x HITACHI Deskstar HD31000 IDK/7K (0S00163) 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive

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August 17, 2011 at 10:14:50
Turns out it was the power supply. I replaced it an all is good. In case anyone is curious, the power supply was a Zalman ZM600-HP. It was actually older than the PC and in total was probably 4 or 5 years old, but there is no manufacture date on it.

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