On 02/24/2014 5:35 AM, Samuel M. Goldwasser wrote:
writes:

Samuel M. Goldwasser wrote:
The only thing that works through HDMI now is that the player turns on
the TV and switches to the connected HDMI input, which is blank.

This is probably a function of the Consumer Electronics Control (CEC)
line on the HDMI input, which is basically an I2C bus for passing
remote-control type data around. It has its own pin on the HDMI
connector. One of the commands a source can send to a display on this
bus is "switch your input to me please". So at least *part* of the
interface is probably working.

There is a small possibility that the high-speed data lines on each HDMI
input go through some kind of fancy buffer/line receiver chip (the son
of a son of an MC1489) before going to the CPU. If there is one of
these chips per input, perhaps they are failing over time. It's
probably more common that all three HDMI inputs go into the CPU or some
other big multi-purpose chip.

Somebody (I think maybe the source, but possibly the TV) is also
supposed to provide +5 V, 50 mA on the HDMI connector. For your case,
where both ends have line power available, I don't think this power is
actually used for anything, but if it's low (power supply fault) or
getting pulled low by something (cable fault?), maybe that is detected
and is causing one end or the other to be unhappy.

If all three HDMI inputs had quit working at once I'd suspect something
like the cable (easy to fix) or the HDCP negotiation (hard to fix by
design). This may fall into the category of grandmothers and eggs, but
have you tried a different HDMI source and HDMI cable?

Yes.

Enough is working that the BD player does turn the TV on via the HDMI
and switches the TV to that HDMI input. It's only when it goes to
paly the disc that the error is produced and no video.

Thanks for responding!


Yeah, this is sounding like bad power, it works until a larger load is
added - the DVD player...

John :-#)#

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