I tried to eject the cartridge after pulling the 7.5amp fuse for a few minute. Put the code back in and gave it a try.
After pressing the eject button very briefly, I heard the motor start to work and then quickly stopped. The cartridge didn't even move (it was too quick I imagine).
So I tried again and this time nothing happened. I going to try again and wait longer, not sure that matters.
UPDATE: same result as the first. It made a quick attempt to move and quit.
Sounds like my Steely Dan CD is stuck for the ages!!