MacBook Pro a1226 (Santa Rosa) No Backlight

krunchprod · **Joined:** Wed Feb 22, 2012 3:14 pm **Posts:** 3

I recently replaced the LCD screen on my MBP a1226 but when it booted up, there was no backlight. Put the old screen back in (it was working but with bad pixels), still no backlight. Read that LED driver board could be cause, so replaced that and the cable. Still no backlight. Can see dim images of desktop on the screen and remote monitor works fine. So what else could be the culprit? Cable seems to plug into something below the logic board at the upper left corner of the case. What is it, and could it be the problem?

justin-pbmedic · **Joined:** Thu Feb 27, 2003 6:35 am **Posts:** 1021

That is the magsafe board and is usually the issue in cases like this. Replacing that should get you up and running.

krunchprod · **Joined:** Wed Feb 22, 2012 3:14 pm **Posts:** 3

Replaced the Mag-safe board. Still no backlight, but oddly, it's now slightly easier to see what's on the screen, as if it's incrementally brighter. Also, the computer boots up much faster than it did before. Not sure what that's about.

One odd note, when I finished the job, I forgot to put the battery back in before I powered up. To my surprise, the thing booted. (I didn't think that was possible). I powered down and put the battery back in, and everything seems to be working normally, except the backlight.

Any ideas?

Thanks.

krunchprod · **Joined:** Wed Feb 22, 2012 3:14 pm **Posts:** 3

I've just discovered something I hadn't noticed before. When I wake the unit up from a "screen sleep", the backlight flashes on for a fraction of a second and then goes off, (or goes very, very dim). What does that indicate?

justin-pbmedic · **Joined:** Thu Feb 27, 2003 6:35 am **Posts:** 1021

Sounds like a short somewhere. Usually that would be in the cable, but since you've replaced that and about everything else that could possibly be involved, all that is really left is the logic board.

MacBook Pro a1226 (Santa Rosa) No Backlight

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