Zum Hauptinhalt wechseln

Verkaufsstart Juni 2012, Model A1278. Intel Prozessor mit Turbo Boost, bis zu 512 MB DDR5 Video RAM

1299 Fragen Alle anzeigen

Where is the fuse for the backlight screen

Hi, I recently bought a MacBook pro 13'' 2012 with a cracked screen which had a ram issue. I just changed the screen with a new one but still no backlight.

I am getting video as I can put a flashlight behind the screen and actually see the boot processing, same thing with an external display.

I read a bit on the backlight fuse and the driver chip too but cant seem to find some images on internet for my specific model.

I took a picture of my bord near the video connector to show you guys where I think my fuse is (the one with a little P on it) and how can I check if its the fuse or the driver...



Block Image

Diese Frage beantworten Ich habe das gleiche Problem

Ist dies eine gute Frage?

Bewertung 3
Einen Kommentar hinzufügen

1 Antwort

Hilfreichste Antwort

Mickael, this is strictly to identify the components you asked about, not to diagnose your board. F9700 is a 3A 32V fuse in a 0603 package and your backlight driver U9701 is a LP8550.

BTW this board has a significant amount of corrosion (marked green in the attached image) which would lead me to believe that it is a water damaged board.

Block Image

You will have to clean it properly and check it for any shortcircuit. Remove the LVDS cable and inspect your connector. I suspect some damage to that as well. Check the pins properly for corrosion and short circuit. At minimum you will need the schematic, board view a multimeter to try to determine which part has failed.

War diese Antwort hilfreich?

Bewertung 5


Hi, where can I get the F9700 fuse, for ebay or amazon or others, I'm based in costa rica


Hi, i have the same problem with the backlight fuse.

When i change the broken fuse, the mp will be run normaly.

But when i shutdown the mp the fuse is broken again.

Has anybody an idea for a solution?


Now i have a solution by myself:

The black plastic of the Clip from the Display plug made

a short circuit when i screw down the backcover.


Einen Kommentar hinzufügen

Antwort hinzufügen

Mickael wird auf ewig dankbar sein.
Statistik anzeigen:

Letzten 24 Stunden: 4

Letzten 7 Tage: 21

Letzten 30 Tage: 100

Insgesamt: 3,630