820-3024 keyboard trackpad not workin

[BCN_Techs]

Hi guys,

Have macbook air 11 with no liquid damage. The problem is that keyboard and trackpad only works if you boot with option key on disk selection. After that in OS not working, Already tried new keyboard, new trackpad, new flex. Not working. Trackpad is good because it works on other macbook.

Checked pin by pin J5700 with all resistor and also changed U5700 but still not working. I have no idea what more can i do. L5710 also is ok and has continuity.

 

[2informaticos]

Check if SMC_LID is stable high.

 

[BCN_Techs]

Yes stable 3,4V.

 

[2informaticos]

Very strange, as in this case no SPI mode available for TP/KB communication.
All the time USB mode is used.
Check pin 10 of U5700.
Try TP alone, disconnecting KB from its board.

 

[BCN_Techs]

already tried only trackpad. Will check U5700 tomorrow and back with result. Thanks.

Yes, very strange, i solved many issues like this on 3437 and 00165 but this one is the worst case of tp/kb not working.

 

[BCN_Techs]

Pin 10 3,2 V and stable. No Idea what more it can be.

 

[2informaticos]

Change U5700 again.

 

[BCN_Techs]

Solved. U5700 was ok. It was U2650. Changed it and now all works fine. Thanks