Getting PC to work again - need help

Question

First sorry for cross posting I was not sure which NG would give me the better response.OKI have a PC I am trying to rescue form my Parents. They had a mouse infestation and they got into the PC and obviously the PC stopped working.I have now cleaned out the PC and removed all the c**p of all boards by using a very similar process as at # and all appears to be looking good.I have reconnected everything and having no additional luck.Symptom is that the MB appears to be gettng power (can see the LED's light up) and when I push the power button the CPU fan and two other case fans spin for a brief couple of seconds and then nothing.So my question what could be the issue can you point me to what I should look at first. I tought of a new case with a new Power supply, but thought before I do that I'd ask here for some ideas.BTW its an ASUS A7V8X MB with an Athlon 2.4Ghz CPU I think :)CheersGreg