AnsweredAssumed Answered

HDMI trouble shooting guide line

Question asked by Elastino on Jan 11, 2011
Latest reply on Jan 14, 2011 by DaveD

Hi, everyone,

 

I came up with extremely silly question.

 

We've been trying to find out any difference between EVAL-ADV7842-7511 and our own board, but failed to the difference.

 

 

Here goes situation.

 

Our board(ADV7511 source) -> 1:2 splitter -> TV1 works, TV2 results no picture.

EVAL-ADV7842-7511(source) -> 1:2 splitter -> TV1 and TV2 work fine.

EVAL-ADV7842-7511(source) -> TV1 works fine directly.

EVAL-ADV7842-7511(source) -> TV2 works fine directly.

Our board(ADV7511 source) -> EVAL-ADV7842-7511(repeater) -> 1:2 splitter -> TV1 works, TV2 results no picture.

Our board(ADV7511 source) -> EVAL-ADV7842-7511(repeater) -> TV1 works fine directly.

Our board(ADV7511 source) -> EVAL-ADV7842-7511(repeater) -> TV2 results in no picture when it is connected directly.

 

The problem is TV2.

TV2 works fine on EVAL-ADV7842-7511 with splitter or without splitter, but not with our board.

 

Please, guide me a trouble shooting guideline of HDMI.

I dumped all registers but I couldn't find any suspicious registers that could occur this.

 

Any suggestion will be pleased.

 

Please, Please, Please, help us here.

 

 

We have ADV7511 with HDCP key and EVAL-ADV7842-7511 with HDCP key since we are registered HDCP adoptor.

 

Here goes more information which can be useful.

 

TV1 does not support CEC.

TV2 supports CEC.

Our boards have ADV7842 and ADV7511 to be operate as a repeater or transmitter(converter from analog).

Our boards DOES NOT support CEC since we are not targeting consumer electronics. CEC pin is open-floated.

Our boards DOES NOT support HEC.

TV1 and TV2 are made by SONY.

Our source is NOT encrypted with HDCP yet. We are feeding video from portable HDMI player.

 

 

Thank you in advance.

 

 

CJ Lee

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