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Computer won't start


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#1
Wolfshadow

Wolfshadow

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O.k this is driving me bloody mad, my computer just won't start up I press the power switch in the front of the case and the fans start up but then immediately stops, the standby led on the motherboard is staying on but everything else just stops.

 

what I have is

ASUS P8Z77-V PRO/THUNDERBOT Motherboard

Intel Core i7-3770k 3.50 GHz CPU

Corsair HX 750 PSU

Two 4GB DDR3

Geforce GTX 670 video card

 

I just don't know what to do plz help.


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#2
iammykyl

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:welcome:  Wolfshadow.

Please confirm this is your MB, > http://dlcdnet.asus....THUNDERBOLT.pdf

Please do the following.

With the PSU switched off.

Take anti static measures by briefly touching a metal part of the case.

Check that all the modular cables are firmly seated at the PSU.

Disconnect/reconnect the 24 pin and 8 pin main cables to the MB.

Disconnect/reconnect the CPU fan plug to the CPU fan header on the MB.

Switch on the PSU, > power up.  Result please.

 

Do you have a MB internal system speaker? if yes, do you hear any beeps.

Is the standby LED the only one lit on the MB at this time?


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#3
Wolfshadow

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Yes, that is the MB and I have done what you said and i am still getting the same results there are no beeps, however the CPU led was on but switched off.


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#4
iammykyl

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With the LED switching off, possible a part has developed a short and the PSU protection kicks in, or the PSU itself is faulty.   It is going to be a case of elimination. 

You will need to disconnected everything from the MB, except 24 and 8 pin power cables and cooler fan, remove the video card and RAM.   When you power on, you will be testing the CPU and MB.  

If the same result, swap in a known working PSU or have it tested, if you still get a fail with a working PSU,  probable a bad MB. 

 

If the stripped down rig works, add parts one by one and test.

One stick of RAM at a time.

Optical drive/s.

HDD/s

Other onboard headers, leave the front panel till last.

Monitor to the integrated video.

Video card.

external hard ware..    


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#5
Wolfshadow

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I disconnected everything except for the 24 and 8 pin power cables and the cooler fan I removed video card and ram. I am still getting the same results however, after turning it on once it turns off again but after a few seconds it turns back on and right back off and repeats this. I have also tried a new identical PSU and got the same results.


Edited by Wolfshadow, 11 September 2014 - 06:13 PM.

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#6
iammykyl

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The CPU could be reaching it's thermal threshold and shutting down.  

Can you see the back of th MB, without taking it out of the case.   Look for the four locking tabs from the cooler, the locking barbs should be gripping the side of the holes with the black centre pins viable.

Try the following.   Press down each locking pin in turn and power on. 


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#7
Wolfshadow

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The Cooler is secured to the MB but I press each down and got the same thing.


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#8
iammykyl

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Please try disconnecting and reseating the 2 main plugs to the MB and power on. 

To eliminate a overheating problem it would be necessary to remove the cooler, clean of the old TIM, from both the top of the CPU and the heatsink, apply new TIM and reinstall the cooler. 


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#9
iammykyl

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Have you managed to to sort out your problem yet?   A update would be appreciated. 


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