Sony SLV-D500P Operating Instructions Manual page 76

Playing in random order (Shuffle play)
You can shuffle the playback order of tracks.
Subsequent "shuffling" may produce a
different playing order.
1
2
To return to normal play
Press CLEAR.
76
Various play mode functions (Program play, Shuffle play, Repeat play)
Press REPEAT when the DVD player is in stop
mode.
Press B/b to select "SHUFFLE", then press
ENTER.
CLEAR
REPEAT
V/v/B/b
ENTER