New system will not stay on.

[jerryskids]

Hello,

I recently built a new system from these components off of Newegg:

Cooler Master HAF 922 Case
Corsair 750TX 750w PSU
Asus Sabertooth x58 LGA1366 Mobo
Intel Core i7-950
Cooler Master V8 CPU cooler
12gigs G.Skill Ripjaws Triple Channel 1333
MSI GTX 560 Ti Twin Frozr
2 WD Caviar Black 640GB HD
1 Asus DVD R/W
Windows 7 64 bit


FYI, this is my first computer build. I spent a few hours setting it up, making sure I was doing things correctly. I got it all together, it POSTs fine and I install Windows 7. Windows 7 installs without a hitch and I install the drivers for the video card.

Everything seems fine. I figured I'd leave the system on idle for a bit, and go into another room to take a break. Next thing I know, the system is rebooting itself, and powering back up. It displayed the Windows Hardware recent change failure yadda yadda screen, and would reboot. I turned it off, let it sit, and powered it back up. It would show this same screen for a few seconds and then restart again. So I decide to go into BIOS at next boot, and it only gives me about 10 seconds and it reboots again. I double check all of the connections and try again, same problem. At this point I go to sleep.

Today, I power it up and it only stays on for about 2 seconds. Then it does not reboot, just stays off.

I breadboard the mobo to make sure it is not shorting out. Same problem.

I reset CMOS and remove the battery. No change.

I removed the hard drives and DVD drive, sometimes it would power up long enough and get the correct beeps for missing Boot Device.

I remove the RAM and get the correct beeps for missing RAM.

I remove the video card, and get the correct beeps for no VGA.

I tested the Power supply with a piece of coated wire (paper clip test) and it runs fine.

I remove the Cooler Master V8 CPU cooler and reseat the CPU and clean/reapply thermal paste.
Upon re-inspection of CPU/pins on mobo, I do not see any bent pins or anything out of place. My CPU fan turns on and runs every time.

After reseating the CPU, I can get to the Windows error screen, but it still powers down before I can do anything there, or in the BIOS.

I am at a loss of what to do. Is my motherboard dead? Is my CPU fried? I don't have another LGA1366 board to test it in. Could my PSU be faulty even though it passed the "paper clip test"? I'm open to any suggestions/tips, as I don't know what to do next. I don't feel comfortable RMAing anything as of yet bc I don't know what exactly is wrong. Thank you for any help!

 

[daship]

The paper clip test dont men anything. You need to use an actual volt meter to test voltages. Your fan spins, but that dont mean its supplying enough volts to run a computer.

 

[jerryskids]

Hi daship,

I went to Radio Shack and bought a digital multimeter.
Plugged a wire piece into the green wire/black ground on the 24-pin mobo connector.
The PSU turns on and fan runs. Turned on the multimeter to 20vDC mode.
I then checked the orange, red, and yellow wires on this connector. All oranges were around 3.3, all reds around 5 and all yellows around 12.

I checked a molex 4-pin connector and those seemed to have correct voltage as well.

I am assuming that this power supply is working correctly. I would like to check it under load, but today, when turning the power supply on and testing the breadboard, I don't get any response beyond a half second fan startup and it goes out. Is this leaning towards a motherboard problem?