Well, the general concensus on the net seems to be that Alienware support sucks, so don't bother.

I don't rate their product very highly either. A tarted up and badged Clevo?

Best I can suggest is to take it to a small local shop and find out what exactly is wrong with it. They will have the equipment to test the power supply at least, and probably most of the other components.

That is a problem with laptops, it isn't easy to get reasonably priced generic or third party parts, and most of them are a pig to work on, which shoves the labour charges up. Go to the manufacturer and you will pay through the nose.

I replaced a Mac G4 HDD the other day........... it took me 90 minutes (and I do know what I am doing) whereas an ordinary desktop would take no more than 10 minutes for an awkward one!