Originally Posted by unknown_artist
I had two dead keys on my Polar... after cleaning the board, one of the dead keys still do not work. I guess, it is needed to replace one pair of that small guys (resistor?). Could anyone confirm if I am wrong or right, please?
Otherwise I may need to exchange the whole board (Silga T120 C 94V0) I assume. But do not have any idea where to get it from.
Many thanks for any advice!
these is crystal diode (germanium) check the image probably all 4 with same measurement.. (i presume )
If you have multimeter , desolder all 4 select diode modality and make the measurement ..if 1 or more is with different value replace.