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820-4924 Keyboard and trackpad disappeared after boot

H

hascanio

New member
Hi, i have a problem with a Macbook Pro 13" 820-4924. Keyboard and trackpad work perfect if i push option button at start : can select drives, enter wifi key and move the trackpad. After boot OS they both disappeared and appear the windows where i have to connect a bluetooth keyboard or mouse.
Things done :
- changed U4820
- changed U4830
- changed U4850
- changed Q7979
- changed U8000
All resistor and capacitors around these chips have correct values.
Thanks
 
H

hascanio

New member
You are the number one ! It had a fall after boot on the PP3V3_S3 due to a corrosion quite invisible. Thank you very much !
 
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