We have an install where a Denon 2112 is installed in the basement and connected to a Sharp 55"(Sorry, don't have model #) via Archview HDMI baluns. The baluns are connected using Cat6 and are working for the most part.

From time to time (VERY intermittent) the video signal will just drop from the TV or won't connect at all. Audio is being sent through the speakers so we know that it isn't between the sources and the Amp. Most of the time the fix is to turn off the TV and back on and it fixes the problem, but the last phone call (Saturday of their party) the video wouldn't display no matter what was done. The only way we got this to work was to connect another display to the amp then re-connected the Sharp TV which then video was displayed

Does anyone have suggestions as to why this is happening? I am thinking that for whatever reason this is an HDCP problem but not sure how to fix. We could replace the Baluns but still can't guarentee a working solution.

Disclaimer: I have seen some Denon WTF topics lately but am not putting any blame on Denon or Sharp for that matter, just a coincidence that a denon is involved.

Depending on the model of Sharp, there is a good chance that you need a firmware update on the TV.

Can you update the Denon 2112 ? I'm a Denon dealer but don't ever remember selling that model

This bit here would lead me to think that you have an EDID issue, and I would bet that the extender is causing it. Being that any firmware updates to the AVR and TV are easier than replacing the extender, I would do them first and if the problem persists I would be looking at the extender.

I'm with eric. Firmware update everything, turn off the CEC feature in the Sharp. Lastly I would check your RJ-45 ends and consider reterminating them. Even if EDID is the problem, timing can be the underlying culprit.

Thanks guys,

Because this is such an intermittent problem we have asked to customer to record everything that they were doing when the signal gets lost (source, time of day, how long system has been on, etc...), to maybe narrow down the problem. If/When we have to go back I will look more into the situation, perform the updates required, in hopes that this resolves the problem.

One Cat6 or two? If it has two, disconnect the video side and see if the audio plays. If it does, the problem is in the termination or somehow related to the cable on the video side of the balun. You could swap the cables, too.

Right, Matt?

If it is a 2 wire design, A/V is on one and data is on the other.

Never the less, proper termination is critical.

A couple questions here, are these baluns passive or powered and for that matter do you have a model#. Do they have the capability of EDID learn? Definetly make sure all the parts of the HDMI stream are running the latest firmware. You may want to make sure any kind of scaling that the Denon can do is turned off. Even though this may seem to be an EDID issue it may be something related to 5 volt. I have seen Sharps that appear to be running low on the 5 volt hotplug that could only be fixed by a 5 volt emulator. How long is the cat-6 run and do you have it terminated in the B configuration? Most HDMI balun systems operate and are designed to work at their optimum in the B configuration.

Any chance it's shielded cat6...if so connect the shield of the display side to a ground on the balun. Then on the head end, connect to a ground on the surge protector. If doesn't fix it it could be related to intereference from some sort of fridge, ice maker microwave, etc. when you find what is causing the problem, install the ethereal super outlet on the appliance. Another problem could be edid, termination, or firmware. Good luck.

Mike

I am dealing with the same problem. After the install the customer calls and tells us about the picture going black on the 60" Sharp LED, with sound still coming out of the Denon 2112 AVR.

Go back out and change out the SnapAV two CAT5/HDMI baluns and do other setting adjustments to the Denon, and BluRay.

Today the customer called back and said that the problem is still happening. Have not done an update on the Denon but the customer said an update was done on the Sharp.

It gets really old when all the parties with these HDMI problems point blame the other manufacturers and leave us to spend hours trying to come up with a solution.

My options are to swap out the Snap 2CAT5/HDMI baluns for the single CAT5/HDMI baluns or to swap out the Denon for another AVR. I will also redo all the RJ45 connectors.

The bummer is the problem sometimes does not happen for an hour or two and it is not possible to know if what you have done has fixed the problem until the customer calls back and tells you that it is still cutting out.

Dave T.

I know we've beaten the 568A/B thing to death, and that the consensus is that there is no difference.
Have we had discussion about running straight pairs from 1-8 with out splitting 3&6? I can't remember.

What he said (about voltage).
With Sharp voltage over distance is a problem.

I've had these same issues using various short, straight HDMI cables with a few Denon receivers. My fix was to add a "FIX" button that turns the TV off and on again. Told the customers this was normal. How many times can I swap out a new receiver for a new one before going insane. I'm betting these are issues with cheap HDMI boards, not repeaters.

How long are the HDMI jumper cables from the baluns to the TVs and the receivers? I just heard from a rep to not use cables shorter than 3'. Most of the issues they had been having we're solved when they pulled the short cables and put a looped up 3' in its place behind the TV.

In my case I am using Binary 1 meter cables at the rack and behind the TV.
Customer did say that if he does not have the problem if he goes directly out of the DirecTV receiver to the transmitter instead of passing through the Denon. I am going to call Denon and talk to them but I have had this conversation before and they always say the problem is not in the Denon it is in one of the other components.

Dave T.