I recently fixed a friend's macbook that had this issue - the backlight shutting off as you open the screen. In bright light/sunlight you can see the display is still on and everything else is working fine. When you close the lid, the backlight would come on just an inch before it was closed.
The backlight power cable runs on the left side, it's quite short, and I assume due to poor assembly (refurb?), the cable is easily routed under the left hinge (which holds the cable down) in a way that it pulls it loose in some positions. You may see the connection to the logic board on your left, it's rectangular and tiny.
I removed the display bezel, left hinge and round cover over the center on the bottom of the display. I probably took apart more than I needed to. Reposition the cable so it has a little more slack behind the hinge. You could move it around until it doesn't pull tight and then tighten the hinge down, (and the display backlight stays on in any position).
As far as I know, the problem has not reoccurred. Good luck.
5 opmerkingen
Thanks very much! I am about to order the cable and have a go at it. If I am going to take things apart to do this, are there any other fixes or low-cost upgrades I should do while I'm in there? Cheers, Matthew
door Matthew Long
Maxing the RAM is relatively cheap.
door mayer
- Dust off internal components and logic board with compressed air (can).
- Visually check all cables and connectors
- Check if all screws are tighten enough on logic board and internal parts
- Remove the optical drive, unscrew the 3 top philips screws, dust off the internal mechanism, the case slot and clean the laser lens with a Qtip and isopropyl alcohol. Apply teflon based grease to moving arms:
http://www.sherline.com/7550pg.htm
- Fan: dust off the fan, lift the top round sticker and inject a drop of sewing machine oil in the top center hole, put back the round sticker and add a piece of scotch tape on it.
http://www.amazon.com/4-oz-Sewing-Machin...
Top case: turn it upside down and gently tap on it to dislodge small particules stuck under the keys. Finish the job with compressed air between the keys.
door lemerise
Matthew - did the cable work?
door jalex
No, it didn't. I went through the whole process to take everything apart and replace the cable, but the problem has not been fixed. At this point I am planning to wipe the hard drive and take it to a local technician to fix as a last-ditch effort, otherwise I'm in the market for a new Macbook, or maybe an iPad.
door Matthew Long