HP Compaq Presario,Presario 800AP Supplementary Manual page 65

You can only change the region
code for the DVD drive five
times. The fifth setting change
you make becomes the
permanent region on the
player. Each time you make a
change to the drive's region
setting, the remaining number
of changes allowed on the DVD
drive is displayed.
Some models have a "regionalized"
feature that limits the playback of
discs to specific geographical regions.
If your Notebook has this feature, the
region code on the DVD drive must
match the region code on the disc.
Although the DVD drive region code
is set at the factory, some DVD drives
(depending on the make and model)
allow you to change the region code. If your Notebook has this
feature, you can change the code a maximum of five times.
If your Notebook offers the option to change region settings,
complete the following steps:
1. Insert a DVD disc into the DVD drive. The Compaq DVD
Player control panel opens automatically.
2. Click the DVD Options
the player. The DVD Options dialog box opens.
3. Select the DVD Region tab. The selected option indicates
the drive's current region setting.
4. If the drive's region setting matches the disc's region setting,
click OK.
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