My KAS-297B is showing the display below. It occurred while I was rotating the altitude preselect outer ring. I suspect it blew a diode or something and needs to be replaced or overhauled. There's quite a range of prices on e-Bay for yellow tagged ($900) vs overhauled ($3+AMU).
What are this group's thoughts on causes and best remedial action?
I just had a factory reman engine, new prop, and twin GI275s installed. Not eager for another capital upgrade to GFC500 right now...