Tom's Hardware > Forum > CPU & Components > CPUs > New PC Build Turns On and Off Repeatedly -No Video

New PC Build Turns On and Off Repeatedly -No Video

Forum CPU & Components : CPUs - New PC Build Turns On and Off Repeatedly -No Video

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wagnrd5   07-17-2009 at 05:23:13 AM

I just completed building a new computer using a EX58-UD4P mobo with an Intel i7 920 chip. Upon turning on, the computer turns on then off repeatedly with about 2 seconds between each action. There is no video output. When I remove the RAM, the computer remains running when it is turned on but still no video. I found the on-off sequence occurs when a stick of memory is in 3 of the 6 RAM slots but it will run with no video when the RMA is in the other 3 slots. I have removed the motherboard from the case and tested on cardboard with the same results as mentioned above. I had a similar problem a while back and RMAed the mobo and CPU but I am still encountering the same issue. Assuming neither the Mobo or CPU are the problem points, I am assuming it must be the power supply (Corsair 750W) or the Corsair memory. However, I seriously doubt all three sticks would be bad. Any suggestions???

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r_manic   07-17-2009 at 05:38:27 AM
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Try to test the sticks somewhere else. Like you however, I'm assuming something's wrong with the power supply. In any case, you've gone through all of this right?

------------------------------ Desktop | E7300 | P5KPL-AM | 2GB DDR2 667MHz | NVIDIA 9500 GT | ST3320613AS | w2228h
XPS M1330 | T8300 | Dell 0U8042 | 2GB DDR2 800MHz | NVIDIA 8400M GS | WD2500BEVS-75US | 1280 x 800
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wagnrd5   07-18-2009 at 05:24:15 AM
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I bought and tested a new power supply and the same problem occurred. I am going to return the mobo for lucky number 3 unless there are additional recommendations.

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wuzy   07-18-2009 at 05:35:38 AM
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If you have tried all 3 sticks individually in all 6 slots (that's 12 possibilities) and the same happens then it's most likely the motherboard.

PSU, CPU and graphics card have all very low DOA rates.

------------------------------ GTL Ref Tweaking Guide - PM for detail
Brand is for the weak-minded, only product matters.
Resilient to marketing.
http://farm3.static.flickr.com/2520/3850950213_aea6bbbcfe_o.jpg
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daship   07-18-2009 at 05:00:08 PM
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I bet its incompatible memory. No way two mobos and 2 cpus are bad.

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RazberyBandit   07-19-2009 at 08:17:19 PM
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I had a similar issue on an AMD machine. Turned out the be the keyboard...

 

Somehow, it was cycling the power while connected to the PS2 port. It worked fine for about a week, then one day while I was playing a game, the system just died like I had a power failure. Afterward, the PC entered into an endless cycle of "Tink, Tink, Tink" noises as it powered up and down every second or two. I tore it down and as I connected the KB via PS2, it instantly powered up. I killed power immediately. I then connected an older, PS2-only keyboard and the problem disappeared. When I connected the new keyboard via USB, I had no problems. But, anytime I connect it via PS2, it instantly powers up the machine, and will randomly kill the power to it. Once that happens, the "Tink, Tink, Tink" noises return.

 

With 6 LED fans and 2 strips of LED lighting, it creates a wonderful light show. :)


Message edited by RazberyBandit on 07-19-2009 at 08:20:30 PM
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