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820-03285 no keyboard no trackpad
- Thread starter bartech
- Start date
All the chips from page 54 have the correct I/O voltages?
"uc380 1- 0v
3-1,3v
4-0,85v"
If you meant UC830, there you have problems.
Missing input voltage (3V8_AON) and enable signal.
3-1,3v
4-0,85v"
If you meant UC830, there you have problems.
Missing input voltage (3V8_AON) and enable signal.
Check PMU_ONOFF_L voltage, w/ and w/o keyboard connected.
TouchID is embedded into keyboard.
TouchID is embedded into keyboard.
That's bad; what about diode mode?
So power button is corroded.
Test with known good keyboard.
Test with known good keyboard.
"when the keyboard board is connected there is short, disconected small board - no short"
Can you post a pictures of the "small board"?
Can you post a pictures of the "small board"?
You've said the connection board was also changed.
Where is the short then?
Post its exact resistance to ground, in ohm scale.
Where is the short then?
Post its exact resistance to ground, in ohm scale.
Check MGL/ND/AMR_1V8 signals with lid open/closed.
Test with new keyboard.
Compare the levels with good working machine.
Compare the levels with good working machine.