HDMI is funny about having sound problems--it does not like to be connected when units are on or even powered up.
Does the receiver have any other hookup options?
about the only suggestion (presuming all is now connected correctly) is to remove power from TV, receiver, box if used for a while---make connections then power everything back up to see if when one or all units reboot it will work or not.
SOURCE: Sony STR-DA5300ES Audio Problem
I am posting this to try and get everyones audio problem for this receiver fixed. If you only connected the HDMI cable to the 510, you will not get sound. This receiver passes through HDMI only, no processing of audio. You must either connect a fiber optic or digital coax to the 510 for that respective HDMI input from the BD player, the DVD HDMI only accepts digital coax, and the Video2 HDMI only accepts fiber optic. If you BD player does not have digital coax out for audio, you must move the connection to Video2 HDMI and connect fiber optic to the Video2 fiber input. Sony butchered the whole purpose of HDMI with this receiver. Hope this heps you. By the way, it is hardware, no firmware update will correct this.
SOURCE: Sony STR-DG510
On this model you can't HDMI is a pass though just for video, No audio, you have to run audio with composite red/white, digital coax or fiber toslink
SOURCE: sony str-dg820. having a problem getting video on tv
Hook up Composite / Component Monitor Out wire from receiver to TV video input because receiver will not change analog input into HDMI
You need to connect receiver and TV through analog video terminals as above.
Actually you are expecting that receiver will convert DVD player and Xbox analog video input into digital HDMI signal for TV and This is incorrect.
SOURCE: No Video or Audio on HDMI on Sony STR-DG800
I dont have the exact model you do, but on my sony receiver I have to enter the setup menu and define where the input is for the device I am using. For example I have to tell the receiver to use the optical audio input instead of the RCA Stereo. Otherwise its on default.
Also, you do know this model of reciever offers only pass-through audio on HDMI? that means no surround sound!!! Thats really silly but thats the specs for this model. To get surround you'll have to use optical. otherwise , with HDMI through this sony you are adding an extra component to tyour system with no benefit other than maybe power amplification.
SOURCE: Receiving "Unlock" message and "Not Used" on my reciever
The HDMI inputs are pass through inputs only. The reciever cannot recieve any sound signals through the HDMI's. The reciever acts as a selector switch for the HDMI inputs. Whatever input you have selected on the reciever is the one that is being sent through the output to your TV. The "unlock" display shows when there is no sound signal sent to the reciever. There is no code to unlock. This is the reciever's way of telling you that there is no sound being sent to it from that input. Since there is no sound being processed from the HDMI's, you need to hook up an additional audio cable from the device to the reciever (preferrably an optical cable). When the reciever recieves an audio signal, it will then "unlock" and you will get sound. The only purpose for the HDMI jacks on this reciever is to give you a bonus HDMI jack so you only have to use one on your TV. I know it is confusing. I had to look into this problem myself, so I'm happy to help. Higher end recievers will actually recieve and process sound signals from the HDMI's.
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