Computer turns on then off immediately

January 8, 2011 at 20:37:07
Specs: Windows 7 - 64 bit, E8600/Crucial
This is my build:

ASRock P43DE LGA 775 Intel P43 ATX Intel Motherboard

Crucial 2GB 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Desktop Memory Model CT25664AA667


Kingston HyperX T1 Series 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model KHX8500D2T1K2/4G

Intel Core 2 Duo E8600 Wolfdale 3.33GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor BX80570E8600

GIGABYTE GV-N250OC-1GI GeForce GTS 250 1GB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

Western Digital Caviar Green WD6400AACS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

Antec Basiq BP430 430W Continuous Power ATX12V Version 2.2 80 PLUS Certified Active PFC Power Supply


Thermaltake Black Widow W0319RU 850W ATX 12V v2.3, EPS 12V v2.91 CrossFire Certified 80 PLUS BRONZE Certified Modular Active PFC Power Supply

I am basically having the similar problem as described in this thread:

I had been using this computer for about a year and a half with this motherboard:
ASUS P5Q SE PLUS LGA 775 Intel P45 ATX Intel Motherboard

and with this PSU:
Rosewill R604TBLK-N 3 x120mm Cooling Fan Pre-Installed on the TOP,Front and Rear ,ATX Mid Tower Computer Case with 450W Power Supply
The computer just shut down randomly and would not turn back on. I took it to a local store and had the power supply checked and was told it was bad as I suspected, so I bought the Antec 430W power supply from their store and tried it with the original motherboard. If I remember right at the time it would start the fans spinning momentarily but that was all, and I had to disconnect the power to make it be capable of spinning the fans momentarily again.

I went ahead and got a new mobo at this point:
GIGABYTE GA-P43-ES3G LGA 775 Intel P43 ATX Intel Motherboard

With this motherboard I was able to make the light turn on and the fans spin briefly as many times as I wanted without having to disconnect the power. I also checked the CPU with another PC to see that it worked, as well as the video and RAM. I attempted to start the system outside the case on foam on a table with the same result. I also tried to start it with minimal components and had the same result. I tried this build as well with a 650W Thermaltake PSU from Best Buy that I have since returned.

At this point I RMAed the GIGABYTE mobo and bought the current mobo. I have tried the current mobo with the Antec PSU and the Thermaltake 850W PSU from Best Buy. Like in the previous thread I can still make the fans spin and the power light blink on momentarily, and if I do not connect the 8-pin connector from either of the PSUs I can make the fans spin and the light stay on indefinitely (or at least as long as I have allowed). This seems like it could provide a pretty specific diagnosis of my problem, so if anybody could help it would be much appreciated. Ask for more details if necessary. Thanks.

p.s. I removed the old thermal paste from the CPU and applied some fresh Arctic Silver in a line down the middle as per the instructions, but I am kind of worried that the shutdowns might be from overheating protection. I'm of course worried as well that I don't have the CPU cooling fan installed tightly enough. Also, I've tried removing the CMOS battery many times.

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January 8, 2011 at 20:47:01
Did you benchtest any of these boards? If not, that's where you need to start. The guy in the other thread apparently didn't remove the motherboard from the case, therefore he never tested the board properly.

How to benchtest your system

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January 8, 2011 at 20:49:56
Does it turn off at the boot screen or when you're using it?

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January 8, 2011 at 20:58:32
It never sends a signal to the monitor regardless of whether I have the 8-pin connector in or not. Also, I have to disconnect power to make it turn off when I ran it without the 8-pin connector. Also, none of the mobos have a built in speaker to listen for beeps.

Thanks for the really quick response by the way.

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Related Solutions

January 9, 2011 at 01:36:56
I'm having the exact same problem, i pulled the cpu out then placed it back in, then a long wailing beep started. Cleaned the ram run fine for 2 days then shut down again. The lights are still on with the keyboard, monitor and usb mouse but nothing, system as follows: DFI expert s939 AMD4200+dual 2gig ddr400 sli7950gtx's. So i'm pulling out my hair at the moment. Good luck hunting as i'm trying to find as weel when i find i will post here 4 u :)

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January 10, 2011 at 20:23:32
I did something a bit unorthodox and put the PC outside in the cold for like 20 minutes to cool it down, then turned it on (with the 430W PSU) and it stayed on for maybe 5 seconds before turning off as opposed to less than a second as it normally does. As I repeatedly turned it on, the time it would stay on became less and less, implying that overheating must be the issue. Is it CPU overheating for sure? This is my first time to have to apply thermal paste myself after all.

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August 22, 2011 at 19:40:07
Has anyone been able to resolve this?

I have the same or very similar problem with my gateway. I bought a new power supply and this is as far as I get (which is further than with the busted power supply, but still something is amiss): all fans fire for about 1 second, then stop (the power light on the box blinks in sync with this). If I put my ear to close enough to the hard drive - I hear it fire, too.

If I can't get guidance on what I should do next (replace motherboard?), maybe some hints as to what went wrong or what I did wrong? I mean honestly I've had this machine for 14 months...pretty disappointed in this hardware called 'gateway' at this point, who I will certainly contact even though my 1 year warranty is up.

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