I have a Meade LXD75 Mount that I purchased from one of our fellow members of Cloudy Nights.
It seemed to work OK the first time I used it, but the second time it would dissolve to gibberish on the hand controlled soon after starting up.
I would then only show the red background light on the hand controlled the next several times I tried to restart the mount.
Then it would work for a short time before exhibiting the same problem.
From what I read, it seemed the hand controller or the cord were the likely culprits, so I replaced both.
This seemed to work the next two or three times I took it out.
Then it went back to being gibberish a minute or so after starting up the mount.
The last time I took it out, I never got the hand controller to show more than jut a red light - no lettering at all.
I'm guessing the issue is in the mount itself, but can't seem to find anything that talks about whether there is any firmware in there to update.