Dead. No longer turns on.
My 2.26 white unibody won't turn on. I connect the magsafe and the light on the magsafe connector goes green, then turns to orange. If I press the power button, the magsafe turns green immediately, then after 20 seconds turns back to orange.
I have tried a replacement used logic board which was sold as working/tested, but the behaviour is exactly the same as before.
I'm at a bit of a loss.
2.26 GHz Motherboard / Ports: Mini DisplayPort, 1000BaseT Ethernet, 2 USB 2.0, Audio In/Audio Out — 3 available at 399.95 each.
Did you spill something on the keyboard? My macbook (06 model) came from a family member who got the keyboard wet. There was a short in the power button. Once I replaced the top case, everything worked perfectly. I made sure that was the problem by jumping the power switch with a fork at the ribbon cable connection. Maybe not the best and safest test, but it helped me figure out it was the top case, not my board.
If it came into my shop I would start by reseating the RAM one chip at a time in each of the slots. Use a multimeter and test the AC magsafe adapter for output (actually I would switch the AC adapter to a known good one). Next test the DC IN port. Then remove the battery and hard drive and test them independently, trying to start the machine with each change. This one is a just a search process and without a spare hard drive, magsafe port, battery, RAM you may be in over your head. I would advise that if the RAM test fails, AC is OK, Magsafe is OK, then take it to a qualified tech.