Can't suggest where to start checking but I do
have several RO LA100s
I guess I'd start by checking all the PSU outputs. I doubt that's the
problem here, but PSU problems can cause the most amazing faults...
awaiting the trip to the scrapper, in case I can help
with any non-kbd parts
before they go.
I do also have the tech manual somewhere; unfortunately IIRC it's on 17"
paper so I can't scan it.
I believe Tony also has a copy and more knowledge/experience than I;
maybe he has some suggestions.
I do have the printset, but it would take me a little time to find it. As
ever I have no scanenr, so I can't provide a copy.
As regards experience, I've worked on these printers, I still have a
couple operational. But I've not really had any trouble with them, so I
can't claim any experience of fixing them.
-tony