It doesn't matter what channel number it ends up on after a scan, as long as you do the scan with it fired up it should detect it. You should then be able to edit but why bother?
I don't understand how a channel number can be described as dumber than dirt, if it does not detect it on an autoscan through ALL channels it won't work manually.
All that said you will get much better results using the video and audio outputs rather than the modulated rf feed. Look here for how to get to those outputs, your TV will need a composite and audio input for that to work.
SEGA Mega Drive Genesis RCA Mod Tutorial Add Video And Audio Outputs To...
You'll have to take the cover off. This only consists of a few screws to remove, and lifting off the cover. When you have the cover off, try turning any white gears (carefully) to open the drawer. Some tray mechanisms have bad design. They refuse to open after a few months. This is in the design of the plastic parts and mechanisms of the cd drawer. Flawed design.
Reset the remote by removal and reinstallation of the batteries. Make sure the batteries are good. Follow the setup guide for the remote.
Here is a YouTube on how to trun the TV on/off without a remote.
https://www.youtube.com/watch?v=SBN47kfPkm0
Changing the main won't help, it's not what's wrong, you have bad LED backlights and in all honesty it's going to make more sense to buy a new TV but this time buy a name brand
A lot of people miss understand how the backlight circuit in the power supply works, you will get voltage testing to ground as its the B- side that's switched, the chassis ground and backlight B- are not connected. If you tested each LED strip and they're all good there has to be something else going on other than the typical backlight issue we see on so many LED sets.. I'm not an authorized service center for this brand TV so I don't have a service manual, if this set has separate power board and main test the bl_on pin on the power supply, you should have around 3.5 volts there, that's what tells the back light section of the power supply to turn on.If you don't then it's a bad main board
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/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.
sad to have to tell you this , but certified tech can not give free advice to anyone or they lose certification and perhaps their job when the boss finds out
Sounds like fault with the main digital board. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
https://elektrotricks.blogspot.com/https://electronicshelponline.blogspot.com/
faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
I tried those things but didn't help. On my sceptre tv, the volume continues going up or down on its own shortly after changing via the remote. I found that if I press the Mute button 2x (off then on again) after setting the volume it will stay put! The mute button stops it from changing on it's own. Its only a work-around that works for me but maybe it will help others.