Sorry I do not have a solution to your problem, but I wanted to suggest another area of investigation. I have the identical problem with a side-by-side. I recently replaced the water filter with the recommended filter bypass plug and I am wondering if this had anything to do with the problem. Did you do anything to your water filter around the time this problem started?

The problem has nothing to do with the motherboard nor the dispenser panel. The water filter also is not causing the problem. (I too replaced mine with a bypass.)

The solution is in the wiring that runs to the front panel ice/water dispenser. Assuming our fridges are identical, with the doors closed remove the plastic toe kick (two screws). At the bottom left you will see a trio (as I recall) of wires that pass from under the left-hand side of the unit and enter the left (freezer) door at the bottom. (The plastic water pipe to the dispenser also is here.) These wires may be wrapped in yellow tape and attached to the fridge frame with the same tape. Remove the tape.

When exposed you will see that these wires pass through a white plastic connector that cannot be unconnected. If you look closely, you will see that one of these very thin wires has probably broken or become unattached. The wires are colored so you will have no difficulty determining which wire that enters the connector belongs to which wire that exits the connector.

Cut the corresponding wire (make sure the fridge is unplugged) and attach it to the broken wire on the other side. Use yellow electrical tape to protect this connection and tape this wire to the top of the white connector (just so everything stays together). (I'm really not sure what purpose the connector serves. In any case, you cannot buy a replacement.)

Using generous applications of the same yellow tape, bind the entire trio of wires and the plastic connector together. Then attach it to the fridge frame as it was before you started so it will not break or become worn when you open the fridge door repeatedly.

This should solve your problem.

.......

While the dispenser panel is removed, take a look at the solenoid mounted beside it that controls the chute through which the ice exits. If yours is like mine, it probably is rusted and should be replaced, a very simple job.

Take a look at the solenoid that controls the ice dispenser hopper, which is mounted in the door-mounted dispenser cavity. It's usually about the size of a shot glass.

After a few years of use it can become rusted and gunked up. It's easy to remove and cheap to replace. Even if it does not solve your problem, it is an electrical part that can become faulty after sitting in all that moisture.

Good luck!

I have a GE Profile PSS26SGRC SS with Arctica ice maker not working. After my intermittent problem (lights on front panel would go out when trying to use any function water or ice) turned into not working at all, I pulled the two Phillips screws and removed the plastic guard under both side by side doors. I found a broken wire at the small black connector under the left side door. Thanks for the heads up on this problem!

THANK YOU ALL!! My ice maker would not work, all control panel lights would go out when trying to get ice, gradually getting worse. I replaced the solenoid first, it needed it as it was badly corroded but did not fix it the problem. I found the corroded wire connector under the hinge of the freezer door. I cut out the corroded white plastic connector and joined black to black, blue to blue and red to white. Back to 100%