1 backlight not working after liquid spill
I have a macbook that works fine after a liquid spill except the backlight does not turn on anymore. There was some residue on the logic board so I presume something related to the power circuitry has short circuited or a fuse has been blown. I checked the screen cable and it is fine.
So my questions:
1) How likely is it that replacing the logic board would solve the problem? Could the backlight itself be broken and how to test this?
2) Does anyone know which part of the logic board is responsible for the backlight power? In that way I could check the components to see if they are broken or not and possibly replace them.
Thanks!
Update
Hi David,
I did not find the fried component. The laptop is sold by now, for a very low price :-(
I was able to find a drawing of a previous generation macbook that allowed one to search for the component's location. I guess it is only a matter of time before such a drawing also comes available for this generation....
Kind regards,
Toon.
Ist dies eine gute Frage?
2 
1 
It seems that http://www.laptop-schematics.com/ have board view schematics of the mother board (820-2567). These should allow you to find the fuse and replace it. I have no experience with this site so I don't know whether the schematics are correct...
von Toon
You better ask them if the component F9800 can be found on the Board View before actually buying it. Might save you a buck or 20...
von Toon
i have the same problem. did you solve anything? Thanks
von Etnolife Italia
I have checked the voltage at the lvds cable and there is no voltage for the backlight. I obtained the schematics for this logic board and probably the fuse that protects the led backlight driver is fried. It is named F9800 in the drawings and should be located near the backlight driver mc34845. Can anyone show me the exact location? Thanks!
von Toon