Sony str-dg510 My Sony STR-DG510 5.1 receiver is not receiving audio output from the Sony Wega (KV-27FS16) 27 inch TV (connected audio cables from 'TV' audio in of reciever to audio out on tv). The TV is connected to the cable via a DVD player using coaxal cables and the DVD player audio plays fine when connected to the "video1" input of receiver, which means reciever seems to be working fine.

Get a 4 in 1 hdmi switcher.

cant use both hdmi and opti outs try sum setting in blue ray but u nee dto plug all blue ray dish directto samsung hdmi then 1 master digital out form tv to sterio digital i n ok tell samsung your output also

Does the tv have an optical output jack? If so, that is probably the easiest way.

The Sony manual for this receiver is not wrong, it is just a little misleading.
It does in fact use HDMI but ONLY for the HIGH DEFINITION video portion of the signal, as output from the receiver to your television. High Definition Multimedia interface carries both audio and video, however, your receiver is not decoding the high definition AUDIO portion of it and passing it through the HDMI, nor is it passing any form of multichannel audio through HDMI. So you can see why the receiver is no longer available for sale from the Sony website. The HDMI connection on your receiver is redundant unless you are not using a multichannel audio format, in which case you would be using either the TV speakers or connect an additional audio cable from the TV's "audio out" back into the receiver for external speakers.
All that should be done is use the HDMI cable from your blu-ray player connected directly to your TV. That will give you your picture, and possibly a better one since the receiver will no longer be in the signal path.
Then connect either a coaxial or optical cable from the blu ray player to the receiver for your audio. You will then be able to have Dolby Digital and DTS surround formats.
Your service person was wrong.

The STR-DG510 carries video only over the HDMI port. Technically, this is a "pass-thru" port. Most older receivers are engineered to operate this way. Why? I don't know. You MUST provide the audio connection using a separate TOSLINK or RCA cable from the program source to the receiver while your video is connected via the HDMI port.

Stick to IT work, MSOFT IT pro. I got smart and bailed out being an IT guru. I got better things to do than screw around with the idiotic nonsense of Microsoft operating systems and applications being a thing of fashion rather than being useful and practical.

You have to use the same connection in and out. You can not mix inputs and outputs (Example- HDMI IN will not play on Component out and Vice Versa.)

The word UNLOCK may appear in the display if there is a problem receiving a digital audio signal. Follow the steps below to troubleshoot this issue.

1. Ensure the correct input is selected to receive the Audio/Video (A/V) from the appropriate source.
2. Ensure a digital cable is connected to appropriate DIGITAL jack.
3. Ensure the other end of the digital cable is properly connected to the A/V source.
4. Ensure the A/V source is set appropriately to output a digital signal.
NOTE: The A/V source may have a DTS setting that needs to be turned on, or a DPCM setting that needs to be set toDolby Digital .

The word UNLOCK may appear in the display if there is a problem receiving a digital audio signal. Follow the steps below to troubleshoot this issue.

1. Ensure the correct input is selected to receive the Audio/Video (A/V) from the appropriate source.
2. Ensure a digital cable is connected to appropriate DIGITAL jack.
3. Ensure the other end of the digital cable is properly connected to the A/V source.
4. Ensure the A/V source is set appropriately to output a digital signal.
NOTE: The A/V source may have a DTS setting that needs to be turned on, or a DPCM setting that needs to be set toDolby Digital .

is the hdmi connected to the tv

please explain in better detail.