rabskyline

when you turn it on it wont fire up, it goes straight back off....it was new last year and my mother gave it to him as she is too old to work it...was fine before !!

bioforger

iTrader: (1)

Sounds like a problem with the power supply then. Try another psu lead just in case its that, and/or another PSU. They're easy to swap over, dont be put off by all the leads.

rabskyline

i thought ot was the power supply and put a new one in...same ! also changed the lead...same...hmmmmmmmmmmm not a good day in my house for computers..

D16GER

Was the system moved from one place to another before it stopped working? May be that something has came loose on the motherboard, or even that something is causing it to short out. Possibly the latter, I have had similar before.

I suggest you remove everything from the case and see if it boots up outside the case. If it does, then carefully reinstall everything making sure nothing is shorting - especially those PITA steel raisers that most case manufacturers use.

Gizmo555

Could be the speed sensor on the CPU fan or other fan. If a speed sensing fan is not working or the sensor is faulty the PC won't boot.

You may be able to swap the fans around or change BIOS settings to work around this.

HankScorpio

I had similar and the CPU heatsink had come loose, it heated up that quickly, it barely had time to do anything. Shows what a good job the coolers do.
Could be many things but another one to check.

scoobynewbie72

iTrader: (1)

does it make any noises while it goes thru these steps?

joe79er

Does the comp get to a certian point then restarts. There is a virus going around where your computer restarts every 15 seconds ie- boots up then restarts without loosing any power?

wrx-kris

from what i've been told - when my dell went down the pan!

remove everything bar the processor
switch it on.... then off
then add ram
switch on.... then off

until it does it again (should be able to work it out by elimination)


have you tried resetting cmos?

rabskyline

guys, will try these things later....bit of a technocaveman but can work a pc but not diagnose very well........

rabskyline

the auxiliary fan stuck inside came loose and it might have damaged something....will look closer now...............

rabskyline

right ...the cpu fan had fell off and it tries to boot up now but lasts 10-15 secs and then goes off. so i it works better for 10 secs more than it did before. i will try putting the old power pack back on...

D16GER

You could be in trouble. If it's an AMD based system, the CPU could well be cooked

bioforger

iTrader: (1)

It wouldnt try to boot up at all if the cpu was fried, i suspect the overheating has fubared somethin on the mobo.

rabskyline

all is well !! the cpu fan is back on...and the right way round didnt think it would matter but it seems to matter ! anyway all help appreciated guys !!!!

bioforger

iTrader: (1)

You were very lucky indeed.