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To unlock DVD region on Tesco Technika 40F22B-FHD/DVD tv, you need to press Source or AV on the remote control and scroll to DVD, then press OK. Then you can make sure you have not loaded a DVD/CD, and then set the TV source to DVD. You may also need to adjust the Region settings in the DVD menu.

Contact to seller.
http://www.tesco.com/help/contact/

Tesco Tech Support

0800 323 4060
0330 123 4060
Day Opening Hours Monday to Saturday: 9am to 8pm Sunday 10am to 6pm

Try www.retrevo.com they have a lot of manual or do a search on google.

you can get parts for thsi TV at www.interliquidparts.com

Technika is a TESCO's own brand electrical product so there would be the best place to go
This one will probably do the trick .http://direct.tesco.com/q/R.208-9375.aspx

Alternativly you could buy a 'universal' remote control but you will then need a set up code to link it to your TV - I have checked a couple of websites that I use regularly but I can't find any codes for Technika TVs.

i buyed technika mp3 player when i connect to my pc it was not showing any folder regarding mp3 player more over my mp3 player was not starting...
plz plz help me on this problem:)

Below is a link to download Tesco's wireless mouse/keyboard drivers. It's a zip file so it will need to be opened and all files extracted before using. Tesco provides little information as to which what Operating Systems the drivers are for, just bundled them all together. Best of luck.
Greg
Tesco Wireless Mouse/Keyboard drivers

Here is the link

http://direct.tesco.com/content/specials/technika.aspx

Having a similar issue with another Tesco Technika product here myself (Digi-cam SH-A366).

Whilst looking about, I have found the following that lists some drivers for Tesco Technika products: http://direct.tesco.com/content/specials/technika.aspx

Whilst this link has not helped me any, it does include the techweb driver that should help out.