As a test, put a glass of water into the bin. It swallowed it and I could hear it go into the drain and the tone of the pump went higher after the water was gone. Still no power to the ice maker. No water flow, no cycling, no lights.
then you have a bad or stuck float switch in the icemaker.
Can you unplug the icemaker ,from the pump and plug it directly into an outlet or a short extension cord for testing the unit?
Disconnected the pump, plugged the ice maker directly into an extension cord and light came on and the unit started to cycle as expected.
Disconnected from the extension cord, plugged the back into the pump and back to no light, solid running pump, no action on the ice maker.
then yes you have a faulty pump assembly .
How old is the unit?
ok so it is out of warranty .
Here is a link for a new drain pump assy.
and yes they are quite expensive.