Early 2006 MacBook won't boot unless pressure is applied on left side
Usually the Macbook doesn't boot on power up. No chime, black screen, no hard drive sound, cd/dvd drive access sound once, sleep light stays on steadily. Tried resetting SMC and PRAM.
If I firmly grip the Macbook on the left side palm rest and the back and press the power button, it will chime and boot!
I apply pressure similar to the way you diagnose an ibook with the GPU solder problem.
The Macbook stays on for a while then suddenly loses power and back to square one.
I took the logic board out, cleaned it, and examined the connections. Same symptoms before and after.
Any ideas? What's on the left side of the Macbook that could be doing this?