I fired up my 2.8 for the first time and the thrust motors work perfectly but the depth motor does not function at all. When I tested the starboard motor the depth motor turned for just a split second but has had no response since.
Check for a crossed, or shorted wire. The first place I would check is 25 pin cable connection on the cable itself, or the board end of the connection. Another possibility is the pins on the back of the board where the connector mounts.
Thank you for the suggestion. I checked the 25 pin connector and found 2 of the pins depressed. I puled them out to the same height as the other pins, then reconnected to ROV and voila!!! The motor works perfectly!
After further inspection it appears epoxy leaked into the pin hole on a couple of the female side. I’m attempting to clean them out,