apple mac book pro 15.4

[alihomee]

this unit got display but no light change cable and led already but same .if somebody got schematic then thats very helpful ..............

[dellxps15]

Re: apple mac book pro 15.4

do you hear the "bong"? what macbook model is it?

some old 2008 mac 15 suffer from graphics card problem and need reball

[alihomee]

Re: apple mac book pro 15.4

yes i can hear the startup sound and also can see the display but the is only its dim i mean no back light

[dellxps15]

Re: apple mac book pro 15.4

first as in this video, check the fuses if are all ok.

https://www.youtube.com/watch?v=vaof55tzPGc

[alihomee]

Re: apple mac book pro 15.4

i can not see any fuses on motherboard for back light

[dellxps15]

Re: apple mac book pro 15.4

generally they are white or brown with a 0 on them.

[alihomee]

Re: apple mac book pro 15.4

nothing like this on the motherboard

[dj_ricoh]

Re: apple mac book pro 15.4

generally they are white or brown with a 0 on them.

0 its a jumper! like a bridge from zone A to B
and the fuse its like a pipe with limited flow

[alihomee]

Re: apple mac book pro 15.4

here is the picture

[lefos]

Re: apple mac book pro 15.4

Usually they are located on the opposite side of the connector.
Also

[alihomee]

Re: apple mac book pro 15.4

i checked already nothing is like this regarding led backlight.there are two fuses one for main supply and the other for gpu supply and both are ok

[dellxps15]

Re: apple mac book pro 15.4

http://i151.photobucket.com/albums/s...DSC04144-1.jpg

that's the backlight fuse. check if you have voltage coming in and out when u power on your macbook.

i sayd that they are white or with a 0, but i mean whire or with a Dot on them, not 0.

[alihomee]

Re: apple mac book pro 15.4

this fuse is ok i found that the back light control ic is bad i think need to change it