My Roomba 614 had a little outside adventure by mistake, sucked up some mud. I cleaned as best I could, but probably used a bit too much water. Took the battery out and dried everything I could reach, but the machine was unresponsive. Got a new battery and installed. It appears to charge correctly (green lights on around center), but it won't do anything else. No error codes or lights. The charge icon is a green outline. I can't enter any diagnostic modes because it appears dead.
Could I have fried the motherboard? I believe I can get a new motherboard and install, but don't want to spend the time/money unnecessarily. How can I determine what needs to be replaced?