On Nov 20, 1:51 pm, "Dani" wrote:
RCA Model # DRC 500 DVD changer. Works fine, but when you press the
eject
button, a red "lock" appears in the display.

The "eject" is driven by a motor connected via a rubber band to the
tray mechanism. I have seen a couple of cases where the rubber band
became old, slack, or broken. Replacing the rubber band solved these
cases.

Could you diagnose your case some more?
- Do you get the "lock" icon immediately, or can you hear the eject
motor whirring unsuccessfully for a moment first?