Panther does not restore playback to the Lombard.
You might get it to work if you maximise RAM to 512MB and get a free app called VLC from
http://www.videolan.org
The only fix I'm aware of is to install a G4 chip.
http://www.xlr8.com
And I'm not even sure about that.
I should mention that Lombards and Pamther have RAM issues. Not always, but frequently.