video help

[buickgnx]

i had brought my ps3 down to my grandparents b/c i was sleeping over. i hooked it up to hdmi at there house worked great thewehn i brought it home today i pluger it into composet cords didnt work then in to the rca and it still didnt work. last i tried remote play on my psp worked got video then disconnected, plz help 

edit nvm i read the manuly i had to read the Manuel.