Incorrect region code

Look at the region code of the DVD that plays on the vehicle DVD if it is the same of the others that do play it's not a region code issue. If the others are a different region to the DVD that plays or the disc says it is region free. Then you might have a problem with the region code settings on the machine. You can look up the model number of that player to see if you can change the region code.
Otherwise check out the player to see if it needs cleaning or is faulty.

If you are in region 1 for DVD's you can't play any other region. You have to buy the right region DVD for the player. http://en.wikipedia.org/wiki/DVD_region_code

Where did u bought this DVD player?US,Canada,and Mexico?The DVD disc. used NTSC region format.Asia,Europe,Africa,and the Middle East.The DVD disc. used PAL region format.They can't be mix or it will not play as u find out.If u move in and out to another region of the world.U must have a regions free DVD player to play either NTSC or PAL regions.

if the movies are pireted then you have to go to freeze.com and the vlc code downloaded on there and they'll play like a charm.
glad to help.

You cannot see region 1 movies unless you change the region code, its designed this way as an anti piracy measure.

try to unlock your dvd player to play all free region. what you need is the code to unlock and a remote control to enter the into menu/programming mode. please specify model # of your dvd player when you look for the unlock key.

Try changing back to region 1. Let us know if it works

DVD movies have region codes, and they typically only play on a player or DVD-ROM drive sold in the country where the DVD movie was sold.

The actual region code is in one byte on the DVD (digital versatile disc). The DVD player or drive has a region code in its firmware. Personal computer DVD-ROM players often have the code in the software or MPEG-2 decoder. The two codes must match for the player or drive to play the movie. The code is also printed on the back of a DVD package, superimposed on a small image of the globe.

DVD regional locking is used to control which DVD movies play in which countries or groups of countries. Movies are often released on different dates around the world. Region 1 has its own player that will only play Region 1 discs. Likewise, Region 2 players can only play Region 2 discs and not play any of Region 1's discs. The six codes are:

1. United States and Canada
2. Europe and Japan
3. Southeast Asia
4. Latin America and Australia
5. Russia, rest of Asia and Africa
6. China

please check the DVD region code again and what PLAYER u are using to play on PC / LAPTOP??

where did you buy the DVD player??

It is not a permanent hack, you will have to to it over for every out of region movie you put in.

1. When "REGION CODE ERROR" shows on screen after you've input your wrong-region DVD you push "ON SCREEN".

2. When the DVD-menu is showing push "ON SCREEN" again and another DVD-menu will appear.

3. Move the arrow over to the clock and press enter. The menu asks for "TIME" and you write 0:00:00 and push enter.

4. You will now see the menu for the movie. Remove the DVD-menu by pushing "ON SCREEN" once. You can now watch the movie.

Yes, US movies are region 1 and China and Southeast Asian markets are region 3. This is supposedly to keep piracy low but considering you can't even burn UMDs yet that's kind of ridiculous. Go to http://www.engadget.com/2005/11/24/neuros-pumps-up-neuros-mpeg-4-recorder-2-for-psps-and-ipods/
to find a mpeg4 converter for UMDs or else you could get a new region 1 drive and flashing your bios. There's talk in the air about Sony releasing it's movies all regions from here on out due to this problem.