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A2681 Water damage, trackpad works but no haptic feedback, keyboard not working.

F

fixupp

New member
I tried to replace the damaged component from a donor board, testing with multiple known working trackpads, trackpad cables, keyboards, small keyboard boards, and a new lid sensor, but still can't get the keyboard working. Trackpad works, but no haptic feedback
 
F

fixupp

New member
Sorry board number: 820-02536
I have replaced the components near the trackpad connector JT400. I can see resister burned and need to clean the pad before replacing with new one. Replaced the followings:
RC852, RC832, RC850, UC850 UC840 UT380 UD230 UT3B0 UT3C0
 
2informaticos

2informaticos

Administrator
Staff member
Just for test, replace LT400 with a jumper.

Be sure all LT20x from page 85 are good.
Check if you get corresct power rails on JT201.
 
F

fixupp

New member
LT400 replaced with a new one.
All LT20x are fine, with correct voltage. no issue with power rails on JT201. Any idea where to check? and is the no haptic feedback related with keyboard not working?
 
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