o.k. so I have a TV and all it has is a d on it so I don't no what the brand is and need the TV to turn to the av channel but I broke the remote and I've bought other remotes but none of the codes work how do I fix this

If none of the codes work, a code search may work.
Some TV's have a hidden panel to select inputs

I know with mine I just go to channel 00 and that flicks it to av mode. It's technically not 00 but it will work in getting there or I just go to the lowest channel and one more.