[Derek12]

The computer (under "My System") was perfectly fine but it was very dusty and the CPU temps were on the high side so...

...I took the motherboard and video card out of the case, removed the CPU HSF (Intel stock), cleaned old thermal paste with alcohol, added new thermal paste (a grain of rice), cleaned CPU and video card fans blades with canned air, put everything back in the case

Now after pressing the power button the computer turns on and off repeatedly, it remains two seconds on (fans and HD work, LEDS are on) then it shuts off for two seconds then it powers up again and it cycles forever. I have to unplug it to stop this cycling.

Everything seems fine, all connections are good, reset CMOS and tried removing all non essential things.

Many thanks.

 

[Corday]

Re: After cleaning computer now it power cycles.

Before someone tells you you should have used the "high priced spread" instead of alcohol, they've seen too many advertisements. The only thing I can think of is lint left after cleaning thermal paste.

 

[Derek12]

Re: After cleaning computer now it power cycles.

Many thanks

Yes I cleaned it with Isopropyl alcohol I've read it was good to remove traces of old thermal paste without leaving smudges.

I did double check everything was OK and clean without drops of thermal paste, alcohol or lints before installing the HSF.

I will rebuild the computer again just in case although I am pretty sure everything is fine but who knows :whistling:.

 

[Derek12]

Re: After cleaning computer now it power cycles.

After rebuilding it, it works fine now :thumb:

I am curious to know what did cause this though.

 

[joeten]

Re: After cleaning computer now it power cycles.

Miss seated Ram or a power cable it could be many things thankfully it is working

 

[Tyree]

Re: After cleaning computer now it power cycles.

As above ^
Apparently something was not reseated or connected properly. Glad you got it resolved.