A1534 - 820-00045-A no keyboard

[hgoncalves]

Hi,

I have an A1534 - 820-00045-A where the keyboard doesn't work. I've already replaced 2 other keyboards, trackpad and cables, and the keyboard still doesn't work.

I supose that the problem is on the board, but I don't know where to start.

F4800 = 8.59V
L4800 = 8.59V
PP3V3_G3H_KBD_F = 3.293V
PP5V_S0_KBD_F = 4.9V

Can you help?

 

[2informaticos]

Very strange; keyboard is not connected directly to MLB.
Still not working before entering macOS, into boot menu?
Power button and SMC reset OK?

Just in case, check SMC_LID.

 

[hgoncalves]

Hi,
SMC_LID = 3.269V

I even booted with an external disk, and it doesn't work.

With an external keyboard, the external keyboard works fine...

 

[2informaticos]

Your problem is between TP and KB.
Test with known good trackpad.