My icemaker isn't making or dispensing ice and no water is coming through either. Do I have to replace the entire thing?

Walt,
We do typically replace the entire ice maker if that is what’s failing. I’ll attach a video for it below, containing a kit that is similar to yours and a link to the ice maker for your model. Also, be sure to check your saddle valve (STV2) at the back of the unit as well for your water. Occasionally there can be main board issues or something else as well so if you have further details of what you’re finding in there, let us know. Hope this helps!