[SOLVED]820-4924 left shift/option/control not working

[ajdoc]

Board after liquid damage near U1950.

Left shift/option/control wont works.
Tested with 100% working keyboard/trackpad and same story.

Checked area U4830 and U4850 and was clean but just in case replaced them and same issue.
U4850/10 = 3.4V
U4830/9 = 3.3V

Any idea?

 

[smiba]

Check continuity on all traces from the keyboard connector to the keyboard IC.

Tried a known good keyboard?

 

[dukefawks]

Bad keyboard connector pin 4.

 

[ajdoc]

SOLVED
Keyboard connector pin 4 had 0.0V (pin was looking OK, so path was damaged)
Jumper and works fine now. Many thanks