Macbook A2442 no display board 820-02098

[dbuergi]

Maybe i found my problem. Looks like LP800 is done. Right now i'm looking for a replacement with 2.2 µH, 8 A.
Any ideas what i can take or if there is anything from another logicboard if not new? I have A2141 and A1932 spares here but didn't find anything with same specs.

[mon2]

LP800 ? Inductors rarely fail. Can you post pics of the part? Why do you believe that this inductor is defective? Inductors can be replaced by others but you need to match the inductance and peak current rating or exceed it and ideally match the same pcb footprint. So for example, same sized 2.2uH @ 15A is fine to use as a replacement, etc. Bourns is a great company we use in our design and there are many others.

[dbuergi]

It looks bad but maybe i can still use it?

[mon2]

Measure if the inductor is conducting by placing the meter in resistance mode across the solder pads on this part. What is the resistance? Yes, looks a bit baked but should be ok unless the inductor internal wiring is damaged.

[dbuergi]

Measure if the inductor is conducting by placing the meter in resistance mode across the solder pads on this part. What is the resistance? Yes, looks a bit baked but should be ok unless the inductor internal wiring is damaged.

I get 0,4 Ohm so it should be fine?
As written before after replacing QP800 and QP802 the board startet but without any display. Strangely i had a short on pad 2 of LP800 after removing it. Replacing QP803 and QP801 fixed it. Maybe this will finally fix my display issues.