Boot Up Problems

[KMS]

hi all,

my computer was working all right, suddenly display froze and now it won't boot up
all monitor, cpu etc lights are on, fans are woking but there is no familiar beep which used to be there and there is nothing comes up on the display

win xp pro sp2
800 mhz cpu
2 nos 10 gb hdd

[Raptor]

Reset the BIOS to its default values by either removing the CMOS battery for ~10 seconds or by shortcircuiting the CMOS jumper.

Refer to your mainboard manual for more information.

[KMS]

removed the CMOS battery, rebooted, its all same
no nomal beep sound and nothing comes up on display

[Raptor]

Remove all the hardware you currently have installed and leave only a stick of RAM, the processor (+ Heatsink/fan) and the videocard in place.

Does it boot now?

[KMS]

I have done so by using one ram stick and taking out other hardware, once it boots up next time it does not
i have tried with both sticks as well, no changes, no display, monitor light just blinks on & off, what else should i do now thanks

[Raptor]

once it boots up next time it does not

It booted once?

Do any components make a buzzing noise? (Not the fans)

Have you got any spare power supplies lying about?

[KMS]

yes it did boot once but did not go upto windows startup.
no components are giving buzzing sound and don't have a spare power supply either

[Raptor]

I would try replacing both the videocard and the PSU and see if the problem repeats. If it still does, you can narrow it down to either the CPU or the motherboard.

But before you do so, do any of the motherboard capacitors appear to be leaking fluid (or dried fluid) like the ones in the example I posted below?

[KMS]

I did all I could, as adivised but everything went wrong.

I decided to change its processor, replaced with new one, it statred normally.

I put the old one just for fun and it worked as well. I returned the new one and old one is still working well since Sturday.

Thanks for all help.

This morning I noticed that my PC turned on by itself, why, is there a new episode of events?

[Raptor]

Perhaps you set it to turn on at a specific time? Check the BIOS.