Brightness Shutdown Problem (Even After Inverter Replacement)
i have a white Macbook Core 2 Duo, model A1181 (Santa Rosa i think), with a brightness problem. it all started when it would shutdown the brightness randomly when it was active or idle. after doing some tests and research, i've noticed that, after the brightness shutdown, decreasing the brightness (via keyboard) to it's minimum and then increase it (via keyboard) would turn the brightness on again. i've also noticed that if i put the brightness to it's maximum that would shutdown the brightness after a few seconds, if it stays one level before the maximum (or lower) it stays on until i do something like touch or move the screen lid (up and down). if i have the power adapter connected it's more difficult to make it shutdown the brightness...on
i've read many pages and forums and it seems the common procedure for this problem is to replace the inverter. so i've replaced it but the problem didn't go away. so i might try to switch the inverter cable now, but maybe you have a better suggestion.
If it does this when the screen is moved, I think you are correct, it sounds like the inverter cable. I'd check its connections and for wear: Repairing MacBook Core 2 Duo Installing LCD & Inverter (fast method) A1181
Here's the part for the Santa Rosa MacBook Santa Rosa/Penryn Inverter Cable
Please give the last three letters of your serial number before ordering for your exact machine. Also look over this guide: MacBook Core 2 Duo Inverter Cable Replacement
Connects the logic board to the display inverter. Replaces a damaged or faulty inverter cable. Compatible with 2.0 (Santa Rosa) or 2.2 GHz Core 2 Duo MacBooks 2.1 or 2.4 GHz Core 2 Duo MacBooks 2 or 2.13 GHz Core 2 Duo MacBooks (Early/Mid 2009). — 36 available at 19.95 each.