Symptom:

No movement up or down!

Power off... remove optic connector with blue & violet wires for clock and direction and let it hang free. Now take the optic connector with green & yellow wires & move it to the now empty optic bd connector. Power on ... move trackball for left & right movement.

Results:

A. You can move up & down now by rolling the ball side to side.

Examine the first optic bd for a cold or open solder joint & replace if it appears to be okay as you most likely have a bad optic sensor.

B. You still cannot move in any direction.

You need to examine the connectors & wiring all the way back to the main PCB edge connector. If you find no breaks/opens in the wiring then chances are that you have a problem on board.
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Symptom:

No movement left or right!

Power off... remove optic connector with green & yellow wires for clock and direction and let it hang free. Now take the optic connector with blue & violet wires & move it to the now empty optic bd connector. Power on ... move trackball for up & down movement.

Results:

A. You can move side to side now by rolling the ball up & down.

Examine the first optic bd for a cold or open solder joint & replace if it appears to be okay as you most likely have a bad optic sensor.

B. You still cannot move in any direction.

You need to examine the connectors & wiring all the way back to the main PCB edge connector. If you find no breaks/opens in the wiring then chances are that you have a problem on board.

Happy Gaming.......