Just wondered if there is any equipment that can be used for testing motherboards,cpu's, psu's etc
Thanks

There are PSU testers, but you have already tried swapping out PSUs. As far as testing CPUs and Motherboards, this can only be done at that CPU or motherboard factories. Sorry.

You can test RAM using one of the following programs. Both require you to create and boot to a bootable floppy disk or CD to run the diagnostics. Allow the diagnostics to run for several passes or even overnight. You should have no reported errors.

Windows Memory Diagnostic - see the easy to follow instructions under Quick Start Information.
or
MemTest86+ (for more advanced users) - an excellent how-to guide is available here.

Alternatively, you could install a single RAM module and try running with that to see if it fails. Repeat process with remaining modules, hopefully identifying the bad stick through a process of elimination.

Missed you new post.

You need to check Gigabyte's web site to make sure it supports your current CPU. And your RAM too.

Motherboard - GIGABYTE

I have seen this motherboard bundle and wondered if i would be be able to install it.
I know my current motherboard is a socket 775 but if i am buying the cpu and motherboard together does it really matter that I replace like for like

If you are replacing the motherboard and CPU, then no, it does not matter - but other things do matter. If you want to carry over your RAM, it must be supported on the new board. If replacing older motherboards (that may support AGP graphics) you may need a new graphics solution. Many new motherboards only have 1 EIDE connection so if all your drives are EIDE, you may need to replace some with SATA. And you should probably look at a PSU - just because having good solid power is so critical to stable operation.

Finally, when replacing the motherboard, unless replacing with a like motherboard as part of a "repair" action, a new motherboard constitutes a new computer and therefore you would need a new license for Windows, and perhaps for some of your other "paid" applications as well. The exception for Windows is if your original license is a "retail" boxed, "full" version you bought at a store. Then you can transfer it to a new computer (as long as removed from old). So if you were planning on using your existing boot drive that has Windows installed on it, you can't legally. And technically, it most likely would not work anyway because during Windows installations, Windows is configured for the hardware it sees, so if you put an existing Windows installation into a new system, it will see the new motherboard (which is really several hardware devices) and not know how to run.

Hmmm.Thanks for your answer.Computers really are a headache!!.
I have contacted Acer to ask them for the make and model of the motherboard in an attempt to get an identical replacement.
I await their response.
Thank you for your help so far

Well despite email communication to Acer they have failed to respond.
So at the moment I cannot identify the make & model of the motherboard and therefore can't replace like for like.
I have googled it but not come up with anything.
i definitely know it isn't the PSU because I have had this attached to another MSI motherboard that I had lying around and that powered up to the bios no problem.
The problem as you say is the windows licence as it was preinstalled on the pc when bought.
I don't know what to do if Acer don't come back to me, I suppose I will have no alterative but to purchase another make of motherboard and build around that and pay for another version of windows.
Seems a farce really but I suppose thats why the man is a multi millionaire!