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System starts up but then shuts down

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  • Gigabyte
  • Motherboards
Last response: in Motherboards
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June 15, 2014 12:49:25 PM

My computer has been running fine for more than 3 years and then I decided to clean out all of the dust and replace the thermal compound. Now when I started it up 6 light on the motherboard came on and all the fans went on too. Then after about a second it turns off then restarts. I have reset the BIOS and taken the motherboard out of its case with just the cpu and motherboards power supplies hooked up and on a cardboard box. still does the same thing

specs
motherboard gigabyte ep45-ds3r
ram NVIDIA ocz2n800sr4gk
cpu intel core 2 duo 3.0ghz
gpu BFG tech GeForce GTS 250
power supply RAIDMAX RX-530SS

More about : system starts shuts

June 15, 2014 1:27:58 PM

Is your HDD or SSD first on the boot priority?
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a b V Motherboard
June 15, 2014 1:36:48 PM

Not trying to be funny here but... it's acting like it's overheating. So check all CPU cooler parts are set right:
1. Is the CPU fan power connected to motherboard?...
2. Is the heatsink firmly attached to the CPU (The pressure cam, lever, etc. may still not be engaged).
3. Did you use the right amount of thermal grease? too much can be just as bad as not enough.

Can't understand is what you mean by two power supplies hooked up. (????)
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a b V Motherboard
June 15, 2014 1:43:10 PM

Did you double check the front panel connections to the motherboard header?..
The power button pins on the motherboard for example; if they are bridged and stay bridged, the computer will start and reboot like that.. so check that this connections are correct. If you have any doubts on this, check the motherboard PDF manual available from the motherboard manufacturer's mobo model downloads.
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June 15, 2014 2:41:55 PM

Chicano said:
Not trying to be funny here but... it's acting like it's overheating. So check all CPU cooler parts are set right:
1. Is the CPU fan power connected to motherboard?...
2. Is the heatsink firmly attached to the CPU (The pressure cam, lever, etc. may still not be engaged).
3. Did you use the right amount of thermal grease? too much can be just as bad as not enough.

Can't understand is what you mean by two power supplies hooked up. (????)


no the cpu power cable and the main one
the cpu fan is connected and all the fans turn on when it starts up. It is firmly lacked onto the motherboard but I am getting a new one soon to try it. I used a grain size of thermal paste in the middle of the cpu. There is nothing wrong with the power button pins
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June 15, 2014 2:58:34 PM



SirGetch said:
Is your HDD or SSD first on the boot priority?


my hard drive should be on first boot priority
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June 15, 2014 4:42:09 PM

Could It be a problem with the Power supply?
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Best solution

a b V Motherboard
June 15, 2014 7:07:26 PM

It's possible!... what the Power switch actually does, is turn the PSU on, and if you jump the power switch pins on the motherboard and hold the jumper on, the PSU is what loops on and off... it's like when from Windows, you press and hold the start button... the system shutsdown within 10 seconds... the difference is Windows controlls the shutdown to save data. So, it may be possible but I won't assure it.. you'll have to try a different PSU to test..

Same problem here turned out to be a lose wire connection... check it.
http://www.tomshardware.com/forum/378412-31-turns-turni...

Also same problem here... someone's comment indicates a failing PSU
http://www.overclock.net/t/952436/computer-turns-on-the...

Same here... turned out to be the PSU
http://www.overclock.net/t/952436/computer-turns-on-the...
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June 15, 2014 9:15:22 PM

Chicano said:
It's possible!... what the Power switch actually does, is turn the PSU on, and if you jump the power switch pins on the motherboard and hold the jumper on, the PSU is what loops on and off... it's like when from Windows, you press and hold the start button... the system shutsdown within 10 seconds... the difference is Windows controlls the shutdown to save data. So, it may be possible but I won't assure it.. you'll have to try a different PSU to test..

Same problem here turned out to be a lose wire connection... check it.
http://www.tomshardware.com/forum/378412-31-turns-turni...

Also same problem here... someone's comment indicates a failing PSU
http://www.overclock.net/t/952436/computer-turns-on-the...

Same here... turned out to be the PSU
http://www.overclock.net/t/952436/computer-turns-on-the...


Tried a different motherboard and did the same thing. Then tries a different power supply and the same motherboard and it worked! Doesn't have enough voltage to support my graphics card though :( 
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