Macbook pro a1286 no backlight

[Instafixx]

Re: Macbook pro a1286 no backlight

Attached.

Hello,
Went ahead and changed the resistor but still no result. Removed the jumper from the Mosfet and now suddenly the light is back on. keeping under observation for 1 day.

[Instafixx]

Re: Macbook pro a1286 no backlight

Attached.

Hello,
We replaced the resistor and see that now the Display is also not there.
So we just removed the mosfet wire to ground that we did and now everything is working fine. It is kept under observation. I have no idea how and why did it happen.

[mon2]

Re: Macbook pro a1286 no backlight

If it is now working this means the bottom 2 x MOSFETs are enabling ok. Only if they are ON, then the voltage divider is created to turn on the top mosfet.

Perhaps a good idea to flux and reflow the bottom 2 x mosfets. If you lose the display, check the gate voltage of the bottom 2 x mosfets.