Casio PX-160 key playing loudly and not making a sound

Hi,
We have a Casio PX-160 and recently we are having problem with keys not making sounds and a key making a sound very loudly. 16th key from left (B) does not make a sound and 18th key (D) plays the sound loudly. It is most likely related to water getting on the keys two days prior. Is there a particular part that would need to be replaced? Thanks -Bar

Hi, It seems that your rubber contacts are in need of replacement. The water spill can also be the problem. The water can also cause problems and if it began to cause corrosion on the circuit traces of the contact board you may need to replace it as well. I am in Austin TX if you would like me to take a look.