I hope I did this right.I tried all the codes pressing VCR/DVD , then setup (till twice blinked),then entered 4 digit code,then pushed play button. None of the codes did anything,however the 0522,and 0060 codes did blink back twice after entering the code.
I tried some codes from another RCA dvd player post on the forum and these 2 codes also gave a double blink back after entering them.
0571
0717

But still none of the codes would work the dvd player.

Editing to say that I tried all the codes in the manual for other dvd players but none will play the dvd player.

Also , I found that the shift key allows me to select the Menu option for the TV settings.