OK I'm trying figure which part is not functioning in this 3GS. I'm under the impression that the Home button completes the circuit between the prongs and the gold contacts when pushed; now if this is correct then shouldn't jumping the two gold contacts on ribbon cable 4 trigger a Home button press? When I do this it still doesn't work. I've tried bending the contact fingers up a little, blowing in compressed air, and tapping the bottom portion of the phone; nothing is working. I just want to be able to trigger a home press so i can isolate which part I need to replace. Ideas?