My Ketron/Solton MS40 freezes up. Sometimes it won't progress past the start page, sometimes it just stops making sound but the lights are on. In past I've opened it and gentle pushed on the chips and it starts working again, but now it freezes more frequently. Big problem for playing for people. Just before it freezes I do hear a slight tic or snap like static. Sometimes it appears related to the Registration buttons. Sometimes it appears related to plugging or unplugging a speaker or amp.

I feel like it is a grounding problem. I'm using a Furman power strip and grounded shielded wires to speakers.
Or maybe it's dirty chips.
Do you recognize this issue and have a fix?

Your efforts replying with ideas are much appreciated.