computer wont boot up

[jhad]

When i press the power button on the computer nothing happens i thought it was the PSU but after checking it in another computer i found it was alright any ideas what the problem could be it just doesn't start to boot.
Thanks jhad

[Jason]

That could be caused by a myriad of reasons.
To narrow it down you'll need to give us more detailed information.
System specs
Did you change any hardware/software before it startd happening
Have you tried booting up with just the bare minimum,HD,floppy RAM

If absolutely nothing happens when you press the power button it would seem like the board isn't
getting power from the PSU.
So, if the PSU is tested and fine like you siad then you should try making sure the power button is
connected properly to the mainboard and hasn't come loose etc.
And that the PSU is connected properly and snugly.

Post back with more info etc and we'll take it from there

[jhad]

The computer is Emachine3210 2.70 celeron, 80gb HD, d845gvsr motherboard, Phoenix BIOS i have switched the PSU from one computer to another and it worked fine i tried booting up with just the hard drive and floppy drive connected but there was still nothing .
tHANKS JHAD

[Jason]

No beeps or fans?
Have you tried a different PSU on that PC just to be double sure.
Also, download and run a <a href="http://www.memtest.org>Memtest</a>
Get the bootable floppy version.
See if it shows up any errors in the RAM

[jhad]

Icant do a memory test as the computer is completely dead there is power to the mainboard as there is a gren light on the board i am wondering if it is the power switch as i cannot open the dvd or cd writer drawers i dont know how i could check the power switch could anything else cause these not to open.
Thanks Jhad

[Jason]

Did you add any hardware prior to the problem occuring?

[jhad]

This is a friends computer he says he added no new hardware before the problem started and the computer was running when everything went dead.
I thought it might be the power switch faulty i tried shorting the switch but still nothing.
Thanks again jhad

[Jason]

Have you tried a different PSU with it?
If that fails I'd advise getting it checked and tested at a reputable PC Repair shop.

[jhad]

Im pretty sure now it's the motherboard that is kaput i have looked all over the internet for a replacement board but no one sems to stock these boards.
Intel d845gvsr mother board
Does any one know of an equvilent board that i could use in this computer, im in the UK.
Thanks jhad

[syphus]

Any motherboard featuring an Intel chipset in the series of i845, i848, i865 and i875 will support a socket 478 Celeron 2.7 GHz. Additionally, there are numerous VIA and SiS chipsets; basically, anything that's socket 478 and supports 400 MHz FSB will do the trick. If you change motherboard model though, Windows re-installation will be unavoidable.

Motherboards with Intel i915 chipsets and above are typically equipped with incompatible LGA775 sockets.

[jhad]

Is it possible to change the BIOS chip on a motherboard
thanks jhad

[syphus]

Yes. But I really don't think you'd understand the point of this

BIOS chip is not the same as Chipset...