I have denon avr 987 receiver i messed up settings somehow. when i have receiver set to dolby digital tv i get sound, but no picture. if i switch the setting to DBS i get picture buy no sound. what did i do?

Use an optical cable.

Be aware though. Your TV has a DVB-T tuner. It picks up the Freeview standard definition (SD) channels, but not the Freeview HD ones. Dolby Digital sound only comes from the Freeview HD channels.

Your TV will pass Dolby Digital from any source connected to a HDMI port to the Optical Out. It will also pass DTS. But the internal Freeview DVB-T tuner doesn't generate Dolby Digital, just stereo and stereo with Dolby Surround encoding where you use ProLogic II for decoding.

Change the hdmi cable and try. If not then you have an hdmi fault module.

What I suggest is that you reset the receiver as you mentioned. If you look in your owner's, there will be a procedure that says, "Return to factory default, or Reset" I believe you have it set wrong, or are not providing it with Dolby Digial signal. Dolby Digital, is not processed by the DSP board(Digital Sound Processor), which handles the THX, Neo, and every other format. Dolby Digital, is one of the earliest form of Home Theater. It has to be processed through the 2 RCA jacks(left and right). It is really not used anymore, in light of Dolby Pro Logic, THX and others.

The Dolby digital signal is outputted only through the Optical or Coaxial socket of the CBL box. you will have to get an optic fiber or coaxial cable depending which cable box you have and connect it to the digital input of the Denon receiver. The Denon's digital input are already assigned at the back. Eg: Optic input might be labeled CD so if you are connecting the CBL box to the optic input remember to select CD on the Denon to hear the cable sound, same goes with the coaxial input.

It sounds like your cable signal is dropping out. Take it up with th carrier.

Dolby signals are passed via either an RF cable or optical link. Both the receiver and player need to have these switched on and that they are passing the correct signals. You clearly found the correct setting for the TV sound link. Now you just have to find the one for the DVD player.

Did you say you went in to DVR set-up and checked the component out audio option? I have had similiar problems with motorola dvr boxes and once I was able to enable audio output option the dvr digital output was fine. Find the manual for the model dvd and this may cure.

IT IS ALWAYS BEST TO CONNECT ANALOG AUDIO IN ADDITION TO THE OPTICAL, COAXIAL OR HDMI AUDIO CONNECTION. IF USING OPTICAL OR COAXIAL CONNECTIONS BE SURE TO CONFIGURE IT IN THE RECEIVERS DIGITAL ASSIGNMENT AREA IN SETUP.
ALSO, ON THE FRONT OF THE RECEIVER IS AN INPUT MODE BUTTON, PRESS THIS BUTTON UNTIL AUTO IS DISPLAYED

If your TV has an HDMI input, hook up the PS3 w/an HDMI cable to the TV. This will give you a high def picture (set up the PS3 to output the max resolution your TV displays). That will take care of the video side.

Next hook up an optical cable from the PS3 to the receiver. In the PS3 menu, you have to change the audio settings to output the sound via the optical cable.

Finally to get sound out of the receiver to the speakers, you have to setup the receiver source input. For example if you setup the PS3 to play thru "VCR" input, then you have to make sure the VCR input is setup to use either optical 1 or optical 2 for sound (whichever one you have the optical cable plugged in from the PS3).

• I found this solution on a different site... it worked for me. I needed to change the sound settings in my ps3 to optical... then i selected dolby 5.1.... that took care of my sound.
  

If your tv is putting out mono you will only get the center and sub speakers. This can be because the tv is only mono, or the output is set to mono in a menu of the tv. If you have cable or sat run the digital audio out to you receiver; it usually sound better that way anyhow. Set your receiver to Dolby mode for best sound.