Replaced Screen, No Backlight, Swapped Back, Still no Backlight
I have a MacBook Pro A1226 with Glossy Display. My backlight still worked, but was flickering and looked like every other light was lit most of the time (striped lighting from the bottom.) A friend said he has a MBP that was the same age as mine that the nVidia chip died and never got it fixed, so I could have his screen. So I took my laptop apart, replaced the screen with his, turned it on and there was no backlight. I checked the display shining a flashlight through the Apple logo and there was a picture, just no light. So further checking his MacBook Pro model (which I should have done in the first case), his was a A1260. So I put my screen back in because though flickering, it was working. Now my screen has no backlight working, but the image does work (again, flashlight through Apple logo.) I've tried resetting the PRAM/SMC/PRAM. Any clues what's going on here? Did I fry something on my motherboard by using the wrong display?
Ist dies eine gute Frage?
3 Kommentare
Ok, I ordered an LED Driver board and replaced it, but still no backlight. I have a sneaking feeling it might be the left I/O board has a bad inverter port, but wanted to know your thoughts.
von Nick Hammaker
Nick, The Left I/O board does not have any involvement in the displays backlight, only the logic board and the LED driver.
At this point you'll need to measure the rail voltages to see whats happening there.
von Dan
Actually in my impatience I swapped out the Left I/O board and it worked! I looked at mine and apparently I bent/broke a pin off when I took the inverter power connector out, so I only had 4 pins instead of the 5 I should have (and the one missing was the brown wire on the connector.) So the laptop is now functioning again.
von Nick Hammaker