i pulled out my 'spare' polaris from storage--- it had been fine last it was  played...and also has new membrane panels--but found  that now it wont play in tune--- and wont auto tune---  in fact as you go up the keys the intervals are odd and even play the same note on successive keys. According to other posts ,   I believe this has to do with bad voice capacitors on the main board.
Does this seem a likely diagnosis?  and if so,  what would the replacement capacitors be --
(type/value/ quantity)?   Would there be any other matters of concern  to replace them?