There are plenty of YouTube videos on how to diagnose Whirlpool (owns Maytag) icemakers. Behind the cover on the end of the icemaker are test points that you jumper to test for power, and activate a cycle. Do a search for "whirlpool ice maker test points". Replacement is usually easy, 3 screws...
If you're looking for a place to repair the bumper take a visit to Ultimate Auto Touch-Ups in Chandler, Cameron the owner started out in-house at the BMW dealership there and has done repairs for me as well.