What is the code of Nvision tv in universal remote

You should have bought a remote that was made for your television. They are $20 and called Facsimile Remotes. No programming and an exact copy of the original. Universal Remotes are so 1980 :>D
Remote Control Codes For SEIKI TVs
SEIKI TV 3 digit remote codes: 564 627 000 505 ; SEIKI TV 4 digit remote codes: 4635 3953 4794 4346 ; SEIKI TV 5 digit remote codes: 12964 13559 13560 10178

SEIKI Remote Controls for which device type?


https://www.replacementremotes.com >
SEIKI Replacement Remotes.com offers SEIKI remote controls for sale online including remote controls for TV, Blu-Ray DVD Player, TV/DVD Combo and many more.

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Question edited for clarity.

No one buys Universal Remotes these days, they are so 1980! You buy a Facsimile Remote, an exact copy of the original like this one.

https://www.remotes.net/products/replacement-remote-for-nad-c720bee

https://www.google.com/search?q=remote+for+NADC720BEE

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I would look the code up on the remote manufacturers web site list.

AVOL 4 digit codes:
2735 1820 3382 2051 2397 3118

AVOL 5 digit codes:
13118 13382 13479 12735 12051 12397 12278 11531

for every remote control device ever made since the beginning of remote control devices?

No problem, but next time, PLEASE give us some clues!

https://www.directutor.com/content/universal-remote-codes

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Set-up (Programming) procedure is too much to type in here, and is not practical and it will differ brand-to-brand remote controls. If you wish to get more; check the sites linked here. The site has set-up code list & set-up procedure to many popular brand remote controls. The site has general set-up codes to check with TVs and other devices are given, in the order of the 'device's brand name list' in alphabetical order. Set-up code list to many brand remote controls also is given. Pull up older posts. Search the sites by type in the brand name to your device in its search box at the top right part of the display window. It will help you to find the document easily.
http://homenol.blogspot.com/
http://remotesearch.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/
http://electro-medical.blogspot.com/
Programming Notes
• If your device does not respond to the remote after trying all codes listed or your brand is not listed in the code list, use the Auto Code Search method to program your remote.
• Sometimes the first code that "works" with your device may operate only a few functions of your device. There may be another code in the code list that performs more functions. Try other codes from the code list for more functionality.
This is a trial and error procedure; and quiet time consuming. You might have to check different codes said for your device.
Search the site by type in the "brand name" to your device; to which you want set-up codes; in the "Search box at the top right of the display window" to get gathered related posts.
{View the site in web view by Mobile or a desktop to see the search box. Mobile view has no search box.}/

Contact the manufacture

wharfdale TVs are rebadged by Argos, so I am unsure of the actual manufacturer, and therefore the control signal scheme that they use.
It might help if you gave the model number of the particular TV, as they could be using several different manufacturers in their range of televisions.
it is unlikely there will be a single code that covers the whole range of Wharfdale Tvs

I have had very good luck with this site:

http://codesforuniversalremotes.com/