Gateway AD-520 - Manual (Page 36)

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Chapter 3: Using the DVD Player
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DVD player basics
Invalid operation symbol
If you press a button on the player and the player does not respond, the icon
may appear on the television screen to indicate an invalid operation. An invalid
operation may occur if:
■ The button you pressed cannot be used in the current player mode.
■ The region code number of the player is different from that of the DVD
disc and playback is not allowed.
■ The parental rating level does not allow playback of the video. For more
information, see
“Ratings Setup” on page 57 .
■ A disc is not playable.
Supported disc types
This DVD player can play only the discs bearing either the or
marks and CD-R or CD-RW discs recorded with Audio CD or MP3 format.
■ This player cannot play discs (such as CD-ROM or DVD-RAM) other than
those listed above. Playing them may generate noise and damage speakers.
■ This player cannot play CD-Rs and CD-RWs that include unreadable file
formats such as data files.
■ Depending on the disc characteristics or recording condition, some of MP3
discs may not be played back.
■ This player conforms to the NTSC color system for United States and
Canada.