Hi people

looking for some xtra help / and a 2nd opinion on my old but luved Fujitsu Scaleo P .
XP home Sp2
Inter Pent4 3.2Gh

My pc started to turn itself off very shortly after booting , it seems a bit random as sometime it gets 2 seconds of power and re-boots or ( like now i am sitting in the BIOS and have been for 15mins and no power down )

The most regualr pattern seems to be that the boot screen loads , gets 6 bars accross the XP screen and then powers down/reboots ( but as i say this is not ALAYS THE CASE !! )

...So i dont think its a Power issue , think its more hardare , but i cant work out what?
Have checked the hard drive , memory,graphics card and all fans.

I have reset the BIOS also and everything looks ok but it just wont last more than 10mins before powering down.....

(20 mins in BIOS screen ..pre-boot...and still no power down...)
ok im gonna save n exit and try to boot it..........BIG BREATH !!! lol

ok it got 7 bars across again on the boot screen and powered down...

any ideas??

Thanks
Simon