yea, good practice, but this only fixes the inject/eject issues. Since yours appears to be ejecting/injecting just fine, I am leaning more towards the push-switch that detects when a floppy is inserted.

get some contact cleaner/deoxit and spray/work it into the disk sensor. Then it might be ok?

I dont have a drive right in front of me, but the push button type sensor is on the front left corner of the drive, youll see the plastic finger sticking up when the disk is inserted, it pushes it down. makes contact and tells the drive a disk has been inserted.

Since your eject motor isnt ejecting, or nothing is happening, the drive electronics isnt sensing a disk being picked up.

Quick check for this is while the disk is inserted, jump across the solder points where the push button switch is located, you should see the disk motor spin up and attempt to read the disk IF its bad. I think there is a sensor on both sides. One is the write protect, and one is the disk sense.