Question about Hitachi P42H401 42 in. Plasma HDTV

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Lose audio to receiver when connecting component video input

When I use my Panasonic DVR and connect to my Hitachi TV using Component Video cables, the pictue is amazing. Funny though that I lose my TV's audio to my receiver. I would connect my DVR to my receiver directly if I had more inputs on my receiver, but that is not exactly the point. When all 3 component inputs connected, no audio out. Unplug the blue, sound returns but screen now black and white. Tried a different DVD player and that one gave me sound and picture if I disconnected the blue from the TV. Tried a different component video cable, and same problem. Something goofy with the blue input on the TV. Any thoughts?

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Re: lose audio to receiver when connecting component...

I don't know if it's firmware or hardware, however, it is NOT a problem, it is the DESIGN -- and an asinine one at that.

Essentially due to copyright issues with HD video, they CAN NOT decode the video to an analog output source. That's all fine and good, however, the audio never fell into that copyright issue. So you should be able to carry though the audio signal from those sources (since in the case of the component input, they're analog anyway). I think Hitachi is the ONLY company that just disables ALL analog outputs when it senses the video signal on the component or HDMI inputs (and you have the tv set for that input). They really should have ONLY disabled the video.

I had a half hour conversation with customer service, begging them to 1) file a complaint to fix this in the next firmware version, or 2) let me speak with an engineer to give me a hack -- obviously they didn't do that :(

The funny thing is, they WILL allow the Optical Audio output signal to carry though.

I've now been frantically searching the internet for information on how to bypass this ridiculous design 'feature'. As this TV isn't that popular, there's not much info out there on how to do so. So, I wouldn't know if I can simply try to attack the firmware code, or, if I actually have to take off the back of the TV and muck around with my soldering iron -- I'm hoping firmware.

One test shows that the control signal to SHUT OFF the entire analog outputs (audio and video) is on the 'Pb' (blue) input of the component video. If I have that one cable pulled out, I can get the Audio out to work and hear everything on my external stereo -- obviously I have a completely jibberish and unwatchable picture though. Once I plug in the 'Pb' cable, the picture comes in, obviously, but the external stereo sound cuts off.

At any rate. Just to reiterate, it's a design issue, and Hitachi seems unwilling to address the HD video copyright issues any other way. I am going to obviously send them a letter by mail telling them how their 'sledge hammer' approach to this issue is ridiculous when there is a 'scalpel' approach that is completely legally viable -- and all their competitors do it that way.

For this reason I now regret buying this TV.

Posted on Feb 12, 2008

Re: lose audio to receiver when connecting component...

Have the exact same problem, opened a case file with Hitachi.

I have a feeling it's a firmware problem -- hopefully they will make my life easy and mail me the proper cable I can connect from PC to TV, and the software to run such an upgrade (as opposed to packing this big thing up and carting it off to a service center).

I'll post my experiences.

Posted on Jan 25, 2008

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Where to hook up white/yellow input wires from receiver to panasonic TC-P50S2. HAVE audio no video feed on tv

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The usual pattern when using a receiver would be to connect the Red/White RCA cables between the receiver and the DVD player audio out. Then connect the Yellow (composite) or Red, Green, and Blue (Pb, Pr, Y component) video cables between the TV and the DVD player. Make sure the connections match at each end; with component video, it can be easy to mix them up. Not all receivers have composite or component video outputs available to the TV. The Composite video will go to the yellow connector at Video In 1 on the TV. The Component video would go to Component In 1 or 2.

Since you don't mention the model of the receiver or how that is connected to the TV, I can't be sure why you have no video. If you have an HDMI connection between the TV and the receiver, the receiver won't convert the signal from composite/component video to HDMI.

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Depending on what type of connection you are using from the cable companies DVR to your TV and what type of connections you have on your TV you can try the following..
1. As your DVD player supports HDMI, component and composite video out, check to see which spare AV inputs you have on your TV and connect the corresponding free input on your TV to the matching connector on your DVD player. You will also need to hook up audio from the player to this AV input on your TV using the options available on your TV (either RCA phono or optical in).
2. If you have no other AV inputs on your TV then buying an HDMI switcher or a component switcher or a simple an RCA phono y cable for composite video will allow you to connect both your DVR and DVD to the same TV input.
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