R1280T

Yes.

Yes, but these Edifier speakers are mainly designed as computer speakers. 

No.

1) Check if the power indicator light is ON. 2) Try to turn up the volume using either the master volume control or remote control. 3) Ensure the audio cables are firmly connected and the input is set correctly on the speakers. 4) Check if there is a signal output from the audio source.

Check if the main power is connected, or if the wall outlet is switched on.