Audio dvd will play visual but no sound. VCR FUNCTIONS OK.

Since you have a VCR built into the same unit and it plays normal, the problem you are having can only be in the DVD circuitry. cleaning the lens won't help, if it plays the video it is reading the disc just fine. Cleaning the disc won't help either, because just like the lens, if it is playing the video it is also reading the audio track. The laser does never reads only the video and not the audio. It gets all the data in a single data stream of digital data. It seperates that data in a series of IC's on the DSP board. The laser is good, all things associated with the laser are good.

all cable connections are good, the VCR is playing fine, there are no other audio outputs for the DVD player to cause the audio not to play on the audio output the VCR is using.

The real problem you are having is nothing that can be fixed by the end user. It could be a digital to analog convertor ic, it could be the codec IC, or a muting transistor in the DVD circuit. There is absolutly no way to troubleshoot this problem without an O-scope, multimeter, and some very, very good troubleshooting skills.

I have been repairing electonics since 1990 and I think I am pretty darn good, I have repaired hundreds of DVD players. I can assure you that the only way to fix this problem is to take it to an authorized service center for your product.

Sorry you had to wait this long to get the right advice but I just started using this website a few days ago.

Run a DVD cleaner (available in the computer supplies section of your local Wal-Mart) through the DVD and see if your results don't improve. It could very easily be a dirty reading lens causing the problem, especially since you report no problems with the VCR, otherwise we'd look into the possibility of a bad cable connection between the TV and input device itself.