Sony VGN-TX1HP/W User Manual page 123

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Troubleshooting
I cannot play a disc
After inserting the disc, wait for a few seconds for the system to detect it before you try to access it.
Make sure the label of the disc is facing up.
If the disc requires software, make sure the software is installed according to the instructions of the program.
Check the volume of your speakers.
Clean the disc with an appropriate cleaner.
Make sure the computer is running on AC power supply only and try the disc again.
There may be condensation in the drive. Remove the disc and leave the drive open for approximately one hour. Remove
the battery while you wait for the condensation to disappear.