Data East Star Trek 25th Anniversary display shows one row of dots
My 1991 Data East Star Trek 25th Anniversary has a display problem. When I power up the machine, the DMD only shows a single horizontal line of dots across the middle of the display. No text, no animations, just one static line of lit dots. The game makes its normal boot sounds and seems to play blind — I can hear sounds when I hit targets.
I've tried reseating the display ribbon cable at both ends and it didn't help. The single line of dots is consistent — it doesn't flicker or change, it's just always there.
I've read that Data East DMDs are different from Williams. Is this a display panel failure or a controller board issue? What should I check?
yemons·3/21/2026★ 1 Answer
A single horizontal line on a Data East DMD is a classic symptom of a failed display panel rather than a controller board issue. What's happening is the panel's row driver circuitry has partially failed — it can only energize one row of the dot matrix. On Data East/Sega DMD panels, the row and column drivers are bonded directly to the glass, and when these connections fail, you get exactly this kind of symptom — a single line or a few scattered rows.
The most reliable fix is to replace the DMD panel. The original Data East plasma DMD panels are essentially the same 128x32 format used in Williams/Bally games of the same era, so you have options. A direct replacement plasma panel can be found at Marco Specialties — make sure you get one specified for Data East, as the connector orientation differs from Williams. For a significant upgrade, consider an LED-based DMD replacement like a ColorDMD, which eliminates the aging plasma technology entirely. Pinball Life also stocks compatible replacement panels.
Before installing the new panel, inspect the DMD controller board in the backbox. Look for any bulging or leaking capacitors — Data East boards are notorious for bad caps, and a failing controller board can damage a new panel. I'd recommend doing a cap kit on the controller board before installing a new display. Also check the high-voltage section of the controller board — the DMD panels require a specific high voltage to operate, and if that voltage supply is out of spec, it can cause display issues or shorten the life of a new panel.
yemons·3/21/2026