Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the sites linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/ http://homenol.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary./
Try to download the user manual to your Telefunken TV form net. Click here to download it.
To unlock the TV, you should have its original remote control.
http://google.com/+GopakumarGopalan
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. It has set-up code list & set-up procedure to many popular brand remote controls. One among it 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. 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 relative post easily.
http://remotesearch.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/
SOURCE: How do i unlock my telefunken tv,serial nr tledd-32fhdb 032013 0571
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
Unlock procedure and to override the password lock to many popular brand TVs are given.
If you have an Android phone you can download this app.
https://play.google.com/store/apps/details?id=com.tekoia.sure.activities
It's by far the best remote app, in my opinion.
If you have an iPhone, just throw it away and buy an Android.
SureMote Universal Remote Android Apps on Google Play
FREE Universal Remote for your WiFi...
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