Grizzly

Hi everyone! yesterday i buy one casiotone 403 and has the same issue, any ideas how to fix?

Hi everyone! im new here so nice to meet you all! im looking for the service manual for the Casiotone CT 403 im buy one yesterday and have various issues, blow rifa cap in the power supply ( 0.022uf 250V now change to poliester one 😇)key matrix flex some loose so one key not sound or sound erratic ( i clean and inspect all the keybed its fine ) and the Rhythm section have a loud noise or sound like a chord sustained and the fill button does nothing...yeah i know its in very bad shape but really i want to give it one last chance for shine...any help you can do its important, here i havent a site where send it to repair it so i guess it must be me! 😜