Pc not starting, cpu turns for a second [Closed]

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 aXXo -
Hello,
This afternoon I turned my pc on, it worked for a while and turned it self off. It restarted, stopped, started then stopped. I pulled out the mains plug and put it in, had a look inside the machine, turned it on and the cpu fan spun around for a second but the pc didn't start. Every time I try to start the pc using the on button, nothing happens. I pull out the mains plug, put it in, press the main on button and the cpu fan spins for a second and stops. I have noticed that there is a little green light on the motherboard when the pc in connected to the mains. I can also hear (when I press my ear to the side of the power unit) a hum, similar to the hum of any electrical item (tv etc) when something is connected to the mains, but not actually on. About 18 months ago, I was cleaning my pc / removing the dust using the nozzle of a vacuum cleaner. I got too close to the cpu fan blades and snapped off one of the blades. The pc worked fine although the fan was quite and has always been noisy as a result. I have been told by many people that I am indeed a 'noob'. I have no idea how to change the fan and it didn't do much so I left it. Looking inside the pc, there is a lot of dust and I will be looking to buy a pc dust spray tomorrow. Can you provide me with any guidance please?! My pc was brought from auspcmarket, as a ready made system and has been very reliable despite me sucking up a cpu fan blade with a vacuum cleaner. PC details are: motherboard: Asus P5B, power unit: GTR 480w, CPU: E6600 2.4ghz. Pc used for gaming mainly with 7900GTO 512mb card. I have 3 fans in the system. One on the cpu, one in the power unit and one in the graphics card. PC has always run very hot. Thanks for any help

4 replies

there could be temperture issue in your case , as soon as the cpu temperature rises up , it shuts down automatically to prevent the damage , jus clean ur cpu-fan , or dislodge the cpu 4m its socket n have a look if the coolant is present on it in enough quantity, apply some coolant over it . then place ur cpu back . it should work for u
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If you have the spare parts, I would definitely recommend swapping out the power supply for a known good one. The motherboard could also be the issue. If you want to do it yourself, make sure you have an anti-static wrist strap to avoid shocking yourself or the system. First try unplugging everything except for the cpu/heatsink, ram, and motherboard. No DVD drive, no hard drive, not even the cables for the usb or audio ports. Try it again. If it still doesn't work, replace the power supply. I had this problem, and it actually turned out to be a flap of metal on the case itself, that was making contact with the motherboard. Pull the motherboard out, and visually inspect your case. If none of this works, return the motherboard for a replacement.
see, I have a problem with my pc wherein my pc wont start as soon as it is turned on..
it may/maynot turn-on after some 2 to 3 minutes..
the thing is that when it turns on(rarely), it works absolutely fine..
what I mean to say about the pc not turning on is that monitor will be on(with a black screen and a yellow led blinking) and the cpu fan and smps all that would be on, but the control signal wont go from cpu to monitor..
also, when the pc turns on, if I restart it the problem of not turning on repeats...
please mail me the solution.....
thanks for advice in advance.....
TRY THE FOLLOWING STEPS CAREFULLY TO ISOLATE THE ISSUE

1* UNPLUG THE RAM , POWER ON THE PC CHECK THE FAN RUNS WHICH MEANS THE ISSUE WITH THE RAM

* IF SO TRY CLEANING THE PINS OF THE RAM AND SOURCE

2*TRY REMOVING THE CMOS AND RAM IF 1) DOES NOT WORK

3*TRY REMOVING THE 4 PIN PLUG 2 YELLOW AND 2 BLACK CAREFULLY IT HAS A PIN WITH THE PLUG

4*THAT WOULD CONCLUDE IF THE 3 OPTION WILL MEAN THE ISSUE WITH THE V RAM OR THE INBUILT VGA

Hi there,

You might be having some troubles with your hardware. The situation is quite complicated. You might be having some disrupting power supply problems as well as motherboard problems. For analyzing the real problem, I would be advising you to get in contact with a computer technician in order to resolve your problem.

Thanks in advance.