Buzzing noise during wash cycle

Hi All,this dishwasher was not cleaning well so I took it apart down to the grinder blade and it really wasn’t dirty, reassembled it and now there is this buzzing noise when it is in the wash cycle and also this kind of black film on the bottom inside the door lip when it is finished washing.it sounds like a bad solenoid,
Thoughts
Geo

You probably didnt get the filter assembled in a fully centered position and the bottom of the impeller is running on the chopper disk… Might disassemble and put back together, that may get it aligned, there is usually an alignment tool with a impeller kit…

I don’t have an aligment tool, is there a way to be sure the impeller is aligned correctly before I reassemble the inside.
Thanks
Geo

All set, your diagnosis was right on.
Thanks
Geo

No problem, been there done that…