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Wayne McAlpine <wayne.mcalpine@xxxxxxxxxxxxxxxxx> wrote:
The diagonal lines are the tip-off. You have a hardware failure.
Agreed. Although there's one other remote possibility: if the brightness and contrast controls have been fiddled with, they *might* be so badly mis-set as to show retrace lines.
Assuming it's not badly mis-set brightness and contrast, something in the high voltage section of the display module has gone bad.
One of the advantages of the 3488 and 3489 terminals is that VGA monitors that can handle the resolutions are a dime a dozen these days. Which tends to offset the fact that in almost all cases, such an external monitor takes at least a full second to change resolutions when you switch between 80x24 and 132x27 modes.
There are still a few places left that fix terminals. -- JHHL
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