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Looks like the unit may use a regular VGA monitor. Which means there isn't a "video" signal, so you'll be looking at red, green, & blue color signals, some sync information, & clock data.
Look here: "http://pinouts.ru/Video/Vga15_pinout.shtml" for the pinout & signals on the connector and if they match up with your connector try a VGA monitor. They may have mixed pins up so you had to buy their monitor.
The board you show is the CPU which appears to be the same as used in the model 201.
The 3 wires going to the connector are probably the RGB output, the only way you can measure and verify that will be with a scope.
Chuck
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