Well my MZX-500 has bugged out finally. The keyboard has developed an intermittent mixer bug. Works sometimes, sometimes doesn’t , and interestingly decides what it wants to work as the bug isn’t always the same. My board is pristine. I actually benched it for a very long time ago because the keys are utter garbage.

So it has been sitting unplugged under a dust cover. I was told Casio doesn’t use a battery based backup system for when you unplug, but use something else. I’ve done numerous factory restores and even reloaded the OS, but it’s still has the problem. I’m wondering if the MZX’s OS becomes corrupted if the board is left unplugged for a long time.

Anywho..., $1,100 down the drain. The only reason I pulled it back out is because I put it up for sale, and now I’ve got to pull it. Last Casio I ever buy.

Sqk