Repair services??

Okay I have tried every method I can aside from the hairdryer method and oven method on account of I think they are incredibly stupid.

I have the YLOD but I am not completely sure its due to the GPU and CPU but possibly due to a bad flash from the previous owner.
I dont own a progskeet and I am also unsure of the entire procedure.

I want to know if anyone knows of a repair service that can run a diagnostic on my system to determine the exact cause of my YLOD?

any suggestions are greatly appreciated!!