Unable to play DVD - incorrect region code or disc type?

here is one thing it says



This unit responds to the Region Management Information recorded on DVD-Video. This unit’s region number is “1”. You cannot play the disc if the region number on the DVD-Video does not correspond to the region number on the unit.

You can play discs marked “1”, “ALL”, or with a region number including “1”.



Here is what I would do - default it to its original state see below -



Do the following to reset the unit to its original factory

settings. While the unit is stopped, press and hold

[;], [:] (backward), and [1, ON] on the main unit

for about 3 seconds until the message “Initialized”

disappears from the LCD, then turn the unit off.
here is one thing it says

This unit responds to the Region Management Information recorded on DVD-Video. This unit’s region number is “1”. You cannot play the disc if the region number on the DVD-Video does not correspond to the region number on the unit.
You can play discs marked “1”, “ALL”, or with a region number including “1”.

Here is what I would do - default it to its original state see below -

Do the following to reset the unit to its original factory
settings. While the unit is stopped, press and hold
[;], [:] (backward), and [1, ON] on the main unit
for about 3 seconds until the message “Initialized”
disappears from the LCD, then turn the unit off.