HP 7855 - Pavilion - 128 MB RAM Update Manual page 24

The movie stopped playing in the middle.
The DVD may be double-sided. Open the disc tray, and read
the text near the centre hole of the disc. If it says Side A, flip
the disc over, close the tray, and then press the Play button
to continue playing the movie.
You may have accidentally paused the DVD movie. Press the
Play button to resume playing the movie.
The message "System Error: Unable to read drive" appears
when running a CD program or a movie on the DVD drive.
Make sure the DVD or CD is clean.
Wait 5 to 10 seconds after closing the disc tray to give the
computer sufficient time to recognize the CD or DVD.
Restart the system:
1.
Remove the CD or DVD.
2.
Click Start on the taskbar.
3.
Select Shut Down.
4.
Choose Restart and click OK.
The DVD drive is not switched on when the system is
restarted.
If you have installed other hardware components in the
HP Pavilion home PC, make sure the power cable is connected to
both the DVD drive and the power supply.
The DVD movie doesn't fill the screen.
Click the Full Screen button on the control panel.
On a double-sided DVD, each side has a different format
(Standard or Widescreen). In the Widescreen format, black
bands appear at the top and bottom of the screen. To view
the Standard format, flip the disc over and play the other
side.
The disc tray does not open when I push the Eject button.
Make sure the computer is on. The disc tray cannot be
opened when the system is off.
Some HP Pavilions have an Eject button on the front door,
under the DVD drive. To open the tray, you must press this
button firmly. (You can also open the front door and press
the Eject button under the DVD drive.)
If you have installed other hardware components in the
HP Pavilion, make sure the power cable is connected to both
the DVD drive and the power supply.
The disc tray opens and closes, but the drive will not play
movies.
If you have installed other hardware components in the PC, make
sure the IDE data cable is connected to both the DVD drive and
the motherboard.
The DVD drive is not detected.
If you have installed other hardware components in the PC, make