I'm posting this just to thank you a thousand times for the tutorial. Today I opened my G5 because it was completely unable to get GPS signal from any satellite, just to find that the pin that touches de mesh had fallen apart from the mainboard and was stuck to the mesh. I removed it, and carefully folded a piece of aluminium foil and put it in the original location of the broken pin. The result: more GPS signal than ever! Hope the fix will last.