newbie is stuck

[big...b]

ive read up loads but cannot find the answer i need.
ive just bought a samsung le37r87bdx i think its called and a phillips home theater system with hdmi upscaler and dolby surround sound.
the first problem is how do i set it up so it plays the sound of whats on the tv?.
and second i seem to be getting hissing from the speakers when there no audio playing through it?
any ideas?

 

[RottenFox]

what philips system is it you own??..that would be a first step,as without any info,how is anyone to help.
your system might not have the correct inputs,or indeed any.