My HDMI input has failed and needs to be replaced. Diagnostics have been done by two different techs. All other Inputs and Outputs work fine. I think, as an engineer myself, I can replace the board myself. The service place wants $700.00 to fix it. Isn't it just a card / board that I can change out? Also, I can't find a part number online.
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Re: HDMI INPUT HAS FAILED
DId the technicians try to reset the HDMI.
The HDMI module will need to be reset after service. Enter the service
menu and select “2”, the Self Check option. Power off the unit using the
Remote. Allow the unit to complete its Cool Down cycle, then unplug the AC
Power. Reconnect the AC Power and power on unit. Confirm HDMI input
sorry the font change on me. this unit has compatbilty issue with some hdmi sorces. there is also a safety interlock sensor if it see extra light it thinks your trying to do something wrong and locks up hdmi.
WARNING. Service mode can result in further damage to set. Care should be taken not to mess with settings unless you know what they are.
1) Set to "0 minutes" using the [SLEEP TIMER] key.
(2) Press the [VIDEO STATUS] key and [DISPLAY] key
simultaneously, then enter the SERVICE MODE.
(3) When the Main Menu is displayed, press  key to enter
the self check mode.
(4) Turn off the power by pressing the [POWER] key on the
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There should be a button on your remote denoting "Input." If you connect the DVD player to the TV on "video input 1" then push the input button on the remote or TV itself until the DVD appears on your TV (which will be Video 1). Some TVs must have the component (in your case) the "DVD" player connected to the TV before the TV will recognize it. Make sure the DVD is powered up and then push the input button until the DVD player appears on the TV. Depending on your TV inputs, there may be multiple inputs like, Video, Component, DVI, or HDMI. The above are listed in the respective order of "quality." HDMI being the best. Whatever input you hook the DVD player up to on the TV will be the "input" you will look for when pressing the input button. Hope this helps.
RCA Authorized service tech looked at it. He determined that the DM Module need to be replaced. The part alone costs $550 + labor. Since the HDMI and component video inputs seem to work, he suggested buying a VCR DVD combo with HDMI output which would be far less than repairing the tv itself. I'n researching the possibility of purchasing the part myself.
I had the same problem with the HDMI connected to my HD cable box DVR. We called the cable company and he changed the box and the problem remained. He said there was something wrong with my TV. The component (5-wire) jacks on input 5 work fine. A few months later i got the 'green tint" problem and the tech came out to replace the whole optical box. I asked about the HDMI problem and he said that the Sony protocol for HDMI is the problem. It will "talk" to some hardware and not others. He has not found a fix, except to use the other A/V inputs and abandon the HDMI (#7) input.