Spitoon - where were you when I needed you?
I built a machine (my first ever self build) which was meant to include "SLi" video technology. Power up. Nothing on the screens, no video output.
Tried all sorts of limited knowledge self assessment - it was all 100% brand new components, nothing brown at the edges. Eventually gave in and took computer to a high street store to their "Firedog" experts.
They asked me what the symptoms were, then had to sell me a US$100 insurance scheme before they could look inside. Paid the fee and as the oik was laying the machine on his workbench he said "This is good, I've never done any SLi work before. I might learn something".
Pratted around for 30 minutes, gave up, said, "Nope, no idea. Suggest a new motherboard. Thanks for coming".