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pc restarting continuously even i am not getting time to see the bios screen

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February 8, 2014 10:16:26 PM

last night i kept my pc on till morning, when i woke up i saw that my pc is restarting continuously, first i switched off the computer from main supply than again i switched on, it started for few minutes and again booting loop started, second i changed smps but it also didn't worked,
my computer is restarting again and again even i am not a getting a single second to see the motherboard welcome screen
my motherboard is p5g41t-mlx
please......... help

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a b V Motherboard
February 8, 2014 11:19:08 PM

We need your full specs to get a better idea of the situation.

however, there are a lot of things to consider when it hapends:

-Check all hardware connections inside your case.
-Make a clear CMOS in order to reset the bios settings.
-Check your PSU
-Check your mobo (bad caps tend to do that kind of issues).
-Check your HDD.
-And the list goes on and on
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February 8, 2014 11:55:19 PM

Thanx a lot, i had already tried the hardware connections, changed psu thrice, checked capacitor, changed hard disk twice..................
but i didn't cleared my CMOS, NOW I DID IT WELL MY COMPUTER STARTED FOR AROUND 5 MINUTES , NOW AGAIN THE SAME PROBLEM OCCURED ..... ANY IDEA....... ???????????
I DON'T KNOW WHAT HAPPENED TO THE PC SUDDENLY, I JUST LEFT IT ON WHOLE NIGHT FOR DOWNLOADING A GAME IN BITCOMET AND IN MORNING I SAW THAT IT WAS RESTARTING AGAIN AND AGAIN WITHOUT SHOWING THE POST BIOS , THEN I PLUGGED OFF THE POWER SUPPLY AND TRIED TO ON IT WELL ITS WAS OK FOR APPROX 3 MINUTES THAN AGAIN IT RESTARTED
1. THEN I CHECKED WIRE CONNECTIONS
2. I CLEAR THE DUST , CHANGED THE RAM , EXCHANGED THE SLOTS, EVEN TRIED WITH SINGLE RAM EACH
3. THAN I CHANGED SMPS
4. THAN I THOUGHT IT WOULD HAVE DUE TO HDD, I CHANGED IT ALSO
5. THAN I CHECK CAPACITORS ALL LOOKED GREAT
FINALLY
6. I DID THE CLEAR CMOS, IT WAS ON TILL APPROX 5 MINUTES THAN AGAIN SAME PROBLEM PERSISTS
ANY MORE SOLUTIONS.....
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a b V Motherboard
February 9, 2014 12:02:41 AM

I NEED YOUR FULL SPECS
I am particulary interested in your PSU brand and model. And if you have any GPU.
Did you see the bios in those 5 min ?, maybe you can see the PSU voltages at bios settings before it turns off.
Also disconnect all unnecesary hardware from mobo( HDDs and cables, just the power swich from case).
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February 9, 2014 12:21:03 AM

motherboard- p5g41t-mlx
processor- core 2 duo 2.93ghz
graphic card- asus nvidia geforce gt640
ram - 4GB
PSU- 400 watts iball
When i cleared the cmos by pin method, and plugged the power supply it automatically started without help of power button , and the problem still continues that is booting again and again this time without post bios message
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a b V Motherboard
February 9, 2014 12:35:54 AM

I just dont trust that PSU brand, I google it, and it looks very generic, you must test with another PSU(maybe from a friend).
also since when are you using that GPU ?
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February 9, 2014 12:43:55 AM

its been a year i am using that GPU and i have never encountered this problem before and that time i was using windows 7 ultimate, i recently installed windows 8 enterprise and all worked fine untill last night when i left my pc on for almost 12 hours i encountered this problem
.............. ok i will change my PSU but how many watts do i require ???????????
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a b V Motherboard
February 9, 2014 12:52:26 AM

Any good branded 400W~500W PSU from XFX, Antec, Corsair TX, Seasonic will be fine, however:
Did you test your system without HDD?, I mean (mobo,CPU,RAM,PSU).
I had some suspention issues, when I first used win 8.
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February 9, 2014 12:58:54 AM

MY cpu temperature is 49 degree centigrade
mobo - 36 degree centigrade
vcore 1.264v
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February 9, 2014 12:59:58 AM

ok i am going to try without hard disk, but then what i have to do ????
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February 9, 2014 1:02:11 AM

i removed the HDD and it started again all by itself without the help of power button
and i have message on screen select proper boot device kinoff and again it turned off automatically and keep going on restarting again and again
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a b V Motherboard
February 9, 2014 1:04:50 AM

Pramay Bhatpahri said:
ok i am going to try without hard disk, but then what i have to do ????


try to see the +12v , +3,3 and +5v values from PSU at hardware monitor at bios settings.

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a b V Motherboard
February 9, 2014 1:08:24 AM

Pramay Bhatpahri said:
i removed the HDD and it started again all by itself without the help of power button
and i have message on screen select proper boot device kinoff and again it turned off automatically and keep going on restarting again and again


that should not happen, it must not start by itself without the help of power button, that seems to be a mobo issue, if not PSU as well.
if the PSU voltage regulation is not working well, and Noise and Ripple levels are too high, then you can get mobo and other hardware damaged at near or long term, thats tipical when using generic PSUs, they are time bombs.
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February 9, 2014 2:09:10 AM

i can see the +3.3V, +5v,+12v, -12V in this order in my psu
my mobo is under warranty should i go to service centre or it may be fault of any other thing like processor or something
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a b V Motherboard
February 9, 2014 6:55:27 AM

Pramay Bhatpahri said:
i can see the +3.3V, +5v,+12v, -12V in this order in my psu
my mobo is under warranty should i go to service centre or it may be fault of any other thing like processor or something

I need you to see the voltage values at bios,
for instance +12v tolerance is from 11,40~12,60 been 5% up and down, from the nominal value. If its beyond that, it means that the PSU voltage regulation is not working properly, with its consecuential issues.

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