recently (and suddenly) I encountered the following problem on my 1040STE.
I uploaded a quick video
As you can see my video output is disturbed... It is not the SM124, as I have more than one, and I tried with multiples monitor... same issue: so it is definitely a problem of the video output on STE.
It seems the TOS and GEM are loading normally. I can barely see the cursor and the desktop (icons, upper bar, etc...); but without the correct vertical and horizontal syncs.
Do you know what could be?
Thanks in advance,