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Please add details of setup so I can help you. For example. My Directv box hooks into my HDTV HDMI. Sound is carried inside that cable. I then get sound on my TV from my Directv RCVR without any other hookup. But I do have more. I use an optical cable to go into my Denon 1312 TV/optical input. Since my Wii, PS3, VCR, and formerly Xbox360 all plug into the HDTV inputs and I use it to switch. The Denon is not HDMI capable so this is best for me.
This is the first thing I would try. hook the HDMI to your HDTV from the CATV/SAT box and turn up the sound on the TV. [Box and TV on and correct input used] If you hear audio, the hook it back up as before. Now, turn on the Denon to radio. and turn it up. Got sound?
NO: check speakers and speaker setting. Let's say you have speakers hooked to A but not B. is the selector on B or AB. That won't work. It has to match the hookup. If speakers are on A only, select A only, etc. Also check with known good speakers. Also check all cables to be plugged into the correct spot and plugged in fully.
Thanks PM me if you need more help.
Hi Jamie, Here's an old trick which you may find useful. Take a run down flashlight cell and confirm the wiring to the speakers by holding the earthing line of the speaker cable to the negative and flash the positive side with the feed to the speaker one at a time. With each swipe you will hear a thump from each speaker as you connect and disconnect. In that way you can confirm the cables are the ones you are connecting. Color coding is not always the same. Use a voltage test meter to confirm the constant power and ignition power and don't forget to earth the set once all other connections have been made, Withour an earth it won't work, but you know that anyway. Regards John
Try switching the external/internal speaker switch on the back of the tv to internal. This way you should at least get sound (from the TV not the sound system) when you change the volume of the TV itself.
Explain your set up if you need more help. By that I mean what do you have hooked to the TV and sound system, Satellite or digital cable box DVD ?
Make a note of where all the inputs to the sound system come from.
do the rca's work and does the speakers work on the radio. if the rca's don't work the rca's do have a fuse inside right next to the rca's on the circuit board. it is a small black rectangle soldered on both sides and has the letter f on it. if no sound comes from the speakers on the doors the output on the radio is probably damaged. the item number of the part is tda 7856
unit needs repair. Look at the b speakers. Conect a speaker or two to the B position. If you have no sound than your surrond sound is ok and the unit is bad. Sound comes directly into the b speaker and not threw the surrond system. My 6070 has a cold start up problem. no sound. time to purchase a new one. to costly to repair.