Wont play dvd - Lenovo ThinkPad T61 Notebook

Will it play in some other computer?
Will it play in a DVD-player?

Is it just one DVD that will not play,
or will _no_ DVDs play?

What software (Windows Media Player, PowerDVD, VLC, other) are you using as your DVD-player controlling-software?

What error-message(s) do you see?

Usual suspects (I have seen each one of these):
1. Home-made DVD defective
a- bad blank
b- bad burn (software settings incorrect)
c- not finalized
d- bad DVD recorder
2. Commercial DVDs - very scratched near center hole where startup data lives
3. Dirty laser lens on DVD player
4. Bad circuitry in DVD player (repairs almost always cost more than a new player)

t6ry cleaning the scanner eye with a cleaning disk

You must have a dvd rom. And install k-lite codec pack. this should do it.

Hope this help

yes the sony dvd players is made for certain regions it wont play other discs that are not either region one or two new zealand i think is region 3

Its the dvd player  some are very picky and will play some and wont play others,  the cheeper dvd players work best 

do you mean wont play on dvd players (connected to tv)
if so its because the software you are using is not compatable.or the way you are burning them.for instance if you use nero dvd (mp4)you can only view with nero but you can config to use with any player.If you mean it wont play on other computers its usually wrong format.you can maybe cure this by updating dvd drive firmware.

If the DVD is not dirty/scratched it might mean it has a stupid security thing that wont let you play "un-copyrighted" dvd.
There are ways around it but I think they are quite costly.

IT DOESNT PLAY DVD BUT PLAY CD I HAVE A SH-M522C

If you have posted the correct model of writer, then it only supports the writing of DVD+R and DVD+RW discs, but CD-R and CD-RW disc writing are supported, and it should play all forms of DVD, so it won't burn DVD-R and RW discs, but if it wont play all types then try a cd/dvd cleaner, but to be honest when writers start playing up the lens is normally faulting and a replacement drive will be required.