I came accross this question, because I've been looking for the remote code for my cable remote. I had originally put the TV remote somewhere in a box when I was moving years ago, Since my cable remote changes the channel, I've been doing the same as you all this time. Therefore, I totally understand your frustration on trying to understanding how to navigate within the menu: It's not what you would think would be a standard or logical way....
Anyway, in my research, I did come accross the TV manual, and I found the instruction on how to reset the TV. I tried the steps, and THEY"RE STILL confusing, so I've added my own hints....hope this helps:
Your TV can be reset to the factory settings in case you forget your Smart Lock password, or want to change the picture, sound, or features settings.
1 Press the MENU button on the remote control to see the onscreen menu.
In the left panel, you will see four icons (from top to bottom)
When the Menu screen is showing the left panel as highlighted light grey, the Chanel buttons have Page up/Page down Functionality
2 Press the the (CH UP) or_(CH DN) buttons to highlight the FEATURES menu.
Navigate to the FEAUTRES menu (icon of pliers and a hammer - bottom of left panel) and you should make sure it is highlighted in blue
3 Press the (VOL+) button to enter into the FEATURES menu.
The right panel should now be highlighted in a light grey
4 Press the (CH UP) or (CH DN) buttons to highlight the FACTORY SETTINGS control.
This will select items in the right panel, FACTORY SETTINGS in on the bottom
5 Press the the _(VOL+) or _(VOL-) buttons to reset the TV to the original factory settings.
6 Press the MENU button repeatedly to clear the menu from the screen.
- TV INSTALL (a tv)
- PICTURE (icon of film)
- SOUND (a piano)
- FEATURES (icon of pliers and a hammer)
The entire manual is found at this link: http://www.m4c.magnavox.com/files/1/15mf200v_37/15mf200v_37_dfu_aen.pdf
BTW, of any one know how I can program or get an RCN remote to use on this TV, please let me know!!!!