Sony DVP-F21S Operating Instructions Manual page 4

On cleaning discs
Do not use a commercially available cleaning
disc. It may cause a malfunction.
IMPORTANT NOTICE
Caution: This player is capable of holding a
still video image or on-screen display
image on your television screen
indefinitely. If you leave the still video
image or on-screen display image displayed
on your TV for an extended period of time
you risk permanent damage to your
television screen. Projection televisions are
especially susceptible to this.
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