Computer Fix the third

Now this was interesting. We had a slow Vista laptop (512 meg of memory? yeah, that'd be why). So we added a gig to that, much better.

Also a Compaq Presario desktop (yes, why not use the same name for laptops and desktop? That definitely won't confuse people) that wouldn't boot. Dead. So, this is my preferred order to check things:

1) unplug everything, see if you get to the Power On Self Test 2) reseat the RAM (this has never helped in my experience, but we try it anyway) 3) no? ok, so as we've only got a power supply and a motherboard in this equation, we swap a new power supply in 4) still not working? well it's probably the motherboard. The patronizing man in the computer shop didn't think I'd done my PD (Problem Determination) properly but a new motherboard fixed it.

So there you go.