Computer keeps turning off and on

November 17, 2012 at 23:41:39
Specs: No OS yet
I don't know what is wrong with my computer. It continuously turns off and on. This is the first computer that I have built myself. I have to unplug the psu for it to stop.

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November 17, 2012 at 23:54:34
Get someone with more hands-on experience in computer building to check it over. It's not possible to suggest what it might be on a forum - it could be anything. Only a physical checkup will stand any chance of finding out what's wrong.

Don't be too proud to ask someone to look at it, it's all part of the learning process.

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November 18, 2012 at 05:56:12
"This is the first computer that I have built myself"

Please list the complete spec list. Since you're building it yourself, you should be able to supply the make/models of the CPU, motherboard, RAM, video card, power supply, hard drive, etc.

Rebooting is an indication of a weak power supply or overheating CPU. Did you benchtest your hardware before installing it in the case? If not, that's where you went wrong:

How to Bench Test / Troubleshoot Your System

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November 18, 2012 at 12:15:45
Alright I did bench test my components and it went very strangely. When I first short circuit the power switch it turns on and boots for like 5 seconds and then turns off. After that, it turns on again but the boot only lasts for about 2 seconds. However when I unplug the one RAM stick that I have, the computer boots and stays on for some reason and then when I plug the RAM stick back in, the system stays on for a little and then turns off again repeating the continuous cycle. Do I have faulty RAM? The only thing I don't have yet is a graphics card. Is it a necessity to boot your computer because I have an Intel cpu and I thought they came with integrated graphics already. I was planning on getting the graphics card a little later since it is a bit pricey. If I need to have it please tell me. My specs are Ultra 650 W PSU, Intel Core i5-3570K, Corsair Vengeance 1600 Mhz 1 stick of 4gb, ASUS P8Z68-V LX Intel Z68 Motherboard, LG 24x DVD/CD drive, Ultra X-Blaster Black ATX Mid-Tower Case, and Seagate Barracuda 1TB hard drive.

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Related Solutions

November 18, 2012 at 14:19:15

I looked at the compatibility list for RAM and my corsair ram always has to have at least 2 sticks of ram plugged in. None of the choices for corsair on the list have 1 stick. I'll be buying another stick soon.

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November 18, 2012 at 17:31:18
I doubt the RAM is the problem. If anything, I would suspect the Ultra PSU, it's not a high quality brand. Do you have a case speaker connected to the board? If not, hook one up. That way you'll here the BIOS beep codes & it may help you to pin-point the problem.

Did you use the stock heatsink/fan on the CPU? Did it have a pre-applied thermal pad or did you apply paste? If you used paste, it must be applied correctly (vertical line method) or it will prevent the system from booting.

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November 29, 2012 at 07:34:26
I prefer Antec or PC Power & Cooling power supplies.

Someone said they doubt the memory is the issue. However, if removing it causes things to work better, it just might be. Check your mo/bo specs, it may REQUIRE 2 DIMMS before it will boot properly.

Make sure everything is hooked up properly. Make sure the cooling fan is installed and operating. As stated, make sure the thermal transfer paste is used and used properly.

If you have a multimeter, check the output of the power supply, maybe it's cutting in and out, or swap it with a known good unit.

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November 29, 2012 at 17:58:35
Sorry for not posting in such a long time. Today, I just bought new 2 new ram sticks that are compatible with my motherboard. I found out the older 2 werent. However, the computer will still not boot correctly. Would my new system not turn on if I installed a 3570k processor because it isn't supported by the BIOS that it currently has? I was going to update the Bios to the version that supported my cpu but the computer will not even run. I'm sure I applied the thermal paste correctly. I think the psu is fine because when I take out both of the ram sticks the the psu, cpu fan, and graphics card fans run perfectly.

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