The inverter cable of my Macbook late 2007 was intermittently broken
1 - 3 horas
My screen would go black from time to time, and only opening and closing the lid several times would fix it.
It was approximately two full hours of concentrated work, especially the reassembly of the display took awhile, but I got it together again. There is a little more damage to the plastic rim than before the repair, but it still looks quite pretty for a more than 4 year old.
I followed the repair guide strictly, and that did the thing. No surprises and a great feeling when it boinged again and the screen lit up...
Phillips #00 Screwdriver
MacBook Santa Rosa/Penryn Inverter Cable