Connect a serial null modem cable to the player and a computer, and connect with some form of serial/terminal program (eg. Kermit).

Power on the empeg, observe all of the nice boot/startup messages, and then hit Control^C to kill off the player application.

Then type this:

rwm
player

...wait for the player to rebuild the databases and start playing again...

<control^C> (again)
rom
exit