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Liquid damage/corrosion, missing components?
-look at caps lock led drive circuit(u5830 q5736 q5738 and q5734)
-check continuity between pin 40 U5701 and pins 5&2 of U5730
Yes water damaged. My initial problem with the board was missing One wire 3,42V, but got that sorted. This board doesn't have any components of the LED drive circuit. I have already tried to replace U5701.