My eject button doesn't want to respond and I'm unable to figure if there's a way to force eject.  Can anyone help?

Thanks in advance

The manual for your unit does not mention a force eject, but it does say in several places that you will be unable to eject if you've used unsupported discs.

If it were me, I would try a hard reset(remove negative battery cable for 15 minutes) and hope eject works after reconnecting the battery.