Hi i have recently bought a LG HR902 5.1 surround sound system (pre-owned) the speaker cables connect to the subwoofer and the subwoofer connects to a receiver/dvd player. the receiver is connected to tv via HDMI and also via an optical/digital cable. I can play dvds and make the sound come from the speakers but only the 2 front speakers and sub, and when i try to play from tv or ps4 there is no sound at all.
can someone please help me? thx.