Remove the wall plug to the television and remove the batteries from the remote.
Wait 15 minutes.
Put NEW batteries in the remote. Plug in the television.
Do you have a smartphone with a forward facing selfie camera? With new batteries in the remote control aim the remote at the front facing camera and press the power button on the remote, You should see a red flash on the smartphone screen, and if you do, the remote control is working.
Sinotec are cheap and nasty televisions and not worth repairing.
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Question edited for clarity.
Question moved from Cell Phones Category.
Cable Television DVR, Satellite Television DVR, Security System DVR?
Make and Model should be on the statutory label near the mains cable, 'make model, serial number, voltage'.
The generally have a reset button hiding in a tiny pinhole.
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Hiteker televisions are made for the Prison Service, so that information would be proprietary. Email the company and ask, giving them your credentials to require this information.
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Without a remote, you can try checking if your Telefunken TV has physical buttons on the TV itself. Look for a button that might be labeled "OK" or something similar. If not, some TVs have a joystick or directional pad that you can use to navigate the on-screen menu and select options. Experiment with the available buttons until you find a way to navigate and confirm selections on your TV. If all else fails, consider purchasing a universal remote that is compatible with your Telefunken TV.
All questions need Full 'make model (what it is)' first 3 words.
You posted to Television and Video Category?
It could be any one of these? 'make model manual' is the search query to find one.
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