Perq 2T1 display fault

Got a Perq 2T1 with the KME 1514 portrait monitor - the display on the front of the unit gets as far as 999 on power-up so it's looking reasonably healthy. Only problem is an unstable display; it seems to be missing out every 4th or so scanline, plus there's some horizontal instability (I can see what appear to be characters on the display, but they aren't readable at all) Anything prone to giving up in these monitors? From looking on the web it appears they have a few custom parts in them :( (of course it's *possible* the fault is in the system, not the monitor I suppose) Oh, and if anyone's dishing out Perq wisdom there's also a Perq 1 with a display fault too - on that one the image is centered on the screen, but squashed into about 80% of the normal width, and maybe 10% of normal height. It's also very non-rectangular in nature. cheers Jules