Problem with new TV and systems?

[Dasbreenee]

I just bought a new TV. I use av cables on my old TV for everything except my ps4 obviously.
Well the new TV, when I plug the 360/PS3 into the comp area and change the channel to comp it says no signal. I did the power cycle and they work fine with hdmi just not the av. They all show up fine on the hdmi channels.

(Not only that but my satellite TV gets no signal when plugged in too)

Anyone have any ideas?

 

[NyanMeow]

So do you have enough HDMI cables that you can just use that instead or no? Sorry, kind of confused here