"Please use audio 3 input for dvi connection" message on Sanyo TV

From the mail:

Dear Coppell TV Repair, after further testing the TV myself it doesn't have sound. It has great picture. Model is DP50741, chassis P50741-01, main board J4JF and when I switch to any HDMI input it says "Please use audio 3 input for DVI connection. Can you fix it?"

Turned out we could.

The problem is not going to be limited to this particular Sanyo model, but since I haven't seen it before in this particular form I decided to post that article and let you know about it.

The board would work just fine on all other inputs, including TV, composite and component. Did not actually try the VGA input, but on the rest it would have sound and picture just fine.

Only on the HDMI inputs it would give the quoted "Please use audio 3 input for DVI connection."

We were split between the HDMI multiplexor, the main processor external memory where various configurations are stored and the standby processor external memory where also various configurations, including, for example, the audio muting selection, is stored.

Well long story short, this time it turned out to be the HDMI multiplexor IC.

Granted , it could have been one of the other two. Or something we didn't think of.

If you're not curious to experiment soldering ICs off and on to find out what caused it for you feel free to look at our board repair services at http://www.coppelltvrepair.com .

And if you feel adventurous then well, good luck and hope this was of help!