820-3662 on trackpad/keyboard

[iClub]

Good morning,
I made tests with new pieces, but it doesn't work. It replaces the u4801, taken from the donor plate 820-3332, but it was not successful either. Can you tell me what it can be ?

 

[2informaticos]

Not sure if 3332 fits 3662.
This chip has firmware, but may be not platform dependent.
Put back original chip and measure signals and voltages around U4801.

Be sure BUTTON_DISABLE stays low.

 

[iClub]

Resolved, the u8000 was burned.