Laptop my sound` dsnt work won my dvd playing

You need to change the region code in the user menu under dvd settings.

Open Control Panel, Sound, Select headphones. What is your OS? What is the OS of other laptops? If you need the Audio driver: http://support.acer.com/product/default.aspx?modelId=4098

What input are you using for the tv? Try using another input

Did you change the audio cable, "just to rule out" If it won't work on the Tv or stereo, there probably is a audio processor problem, or a issue with the laser pickup assembly, to repair this kind of problem would not justify the cost.

The DVD read head may need to be cleaned. Sometimes perfectly OK drives also fail to read certain discs. If the problem is persistent, i.e. the notebook won't read any discs, then clean the head (with a head cleaner) and try again. If it starts working, fine.. If not, then you may have to replace the DVD drive. If the problem is only related to playing one particular DVD, then its the DVD that is faulty.
Hope this helps.

Does the laptop play CDs?
If so then when you start a DVD and before you play the movie, go into the audio setting and configure the speakers for laptop stereo speakers.
If you cannot hear music from the CD then check :-
1. The audio settings, volume not set to minimum and mute is not ticked (enabled)
2. Device manager - sound device is enabled and working, if not re-install the sound driver.

It's most likely a hardware problem with the drive. You can try cleaning the laser carefully, but 95% of the time the drive needs to be replaced when users experience this problem.

First try reinstall the OS.

ok " get a CD/ DVD cleaning disk , you pop that in and it will clean the lens inside, and they don't cost much, but do so much
good. happy movie watching