computer help!!

Jenks · World Chat Champion Joined: 22 May 2006 Karma :

Just a quick one!

Basically, i have just gone to turn my second pc on - (Hasnt been used in about a month)

press on, and the fans turn once or twice, and then stop - same with leds.

so i swapped the power supply back for the old one (which i swapped over just before i stopped using it - but did test it and it was fine)

Now i turn it on, It all powers up... Mouse lights up... Nothing on screen...

Press on/off / reset and nothing, Try hard shutdown - hold off - nothing...

Have to turn it off via the plug!!!

Whats happening?
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1978 MZ TS 250 1 Supa 5
1992 yamaha fzr1000 exup
1998 aprilia af1 sintesi

ken · World Chat Champion Joined: 12 Oct 2006 Karma :

Jenks have you got all the correct wires fitted to the motherboard not the big plugs them likkle black ones that are right cnts to fit with fat stubby fingers, It is a problem I faced and sorted with reading mobo instructions to get the right order.
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Jenks · World Chat Champion Joined: 22 May 2006 Karma :

yep as far as i know.

i havent touched them at all.

Just put the newer psu back in, and tryed it, and it does exactilly as before - Lights up, spins, and shuts off.
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1978 MZ TS 250 1 Supa 5
1992 yamaha fzr1000 exup
1998 aprilia af1 sintesi

CortezTheKill... · Could Be A Chat Bot Joined: 19 Sep 2006 Karma :

I had exactly the same problem a couple of weeks ago when I installed some cheap RAM from E-buyer. The computer booted, the fans whirred then it shut off again.

Taking the RAM chips out restored it back to normal.

Not saying this is your problem necessarily, but whatever it is I think it's the BIOS detecting a pretty fundamental error and shutting off before the problem causes any damage.
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Colin Edwards · Brolly Dolly Joined: 06 Jul 2007 Karma :

Also had it if the fan on the cpu has become unplugged or is obstructed....

CE

Jenks · World Chat Champion Joined: 22 May 2006 Karma :

tryed either of the ram, and none, checked fan ect. nothing.
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1978 MZ TS 250 1 Supa 5
1992 yamaha fzr1000 exup
1998 aprilia af1 sintesi

DEN MONKEY · World Chat Champion Joined: 17 May 2005 Karma :

Not suggesting this is your problem but had pretty much the same issue with a pc a while back and it turned out to be a blow cap on the mobo.

Maybe jump in with a torch and look for any swollen ones or burnt looking.

Hard to pick something like this unless you have other parts there ready to swap over and check them all out
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meh

Colin Edwards · Brolly Dolly Joined: 06 Jul 2007 Karma :

Can you enlighten me to what a "blow cap" is?

CE

DEN MONKEY · World Chat Champion Joined: 17 May 2005 Karma :

Sorry mate that was meant to be blown cap.
as in short for capacitor.

its there little bastards that are all over the motherboard.

https://www.atlascomponentes.com.br/images/html/resistoresardosia300pxw.jpg

I was just looking for an example of one thats shit itself and found this website.

Sounds just like what you are experiencing. so might be worth a look.

I didnt read it all though.

https://www.jebswebsite.com/IBM_bad_capacitors.htm
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meh