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I have an LG HDTV 47LG50. Connected to a Verizon STB using HDMI cable. Intermittently I lose the picture and sound. Get a "Invalid Signal" indication on screen. Must unplug and restart STB to resolve problem. All other TV Input connections work fine.

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Would almost think that your hdmi cables are bad if all other inouts are correct try replacing your hdmi cables

Posted on Aug 16, 2008

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I have started setup for hd cable. Am connected to hdmi and have picture and sound but am unable to change channels. What do I need to do.


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I have an LG 47" TV (47LG50) that I bought a year and a half ago. It worked great up until now. I have three seperate HDMI ports (PS3, Cable and Blu-Ray.) It all off a sudden says "no signal" to all...


Tries reset the tv and cable box,by unplug,replug both devices about an hour later.Let the cable boot up and update it softwares.Goto tv Menu goto PICTURE,go down to reset.The Tuner board it reseting to the Factory setting.The HDMI hubs,should all works now.Not than,the tv Tuner board have problems,must be change.Tries Shopjimmy.com,Ebay.com to buy a refurbish a Tuner board for the replacement.

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The picture on my TV is now a green screen


I had the same problem on my Sharp LC-32SB24U Liquid Crystal TV. When I couldn't find any solutions on this site, I looked elsewhere on the internet. I found two credible leads.

First, supposedly, this is a known problem that is caused by a known problem with Verizon FIOS. Apparently, there's a problem that Verizon knows about that has to do with the signal between the Set Top Box (STB) and the TV, via the HDMI cable. Other posters on other sites said that the problem is more common with the 7100 series STB's and that the problem is not as rampant on the 6400 series STB's. (Mine is a 7200 series STB.) I have not called Verizon yet, but other posters said that Verizon just says that you'll have to use a set of basic red, yellow, and white cables, versus and HDMI cable, until Verizon gets the bugs out of the system.

The other credible lead revolves around unplugging the TV for two minutes and then plugging it back in. Simple.

Here's what I did, and it worked!
I unplugged the STB and let it sit for 5 minutes. Then, when I plugged the STB back in and powered itself back up, my problem was solved! (Before I did this, I tried just unplugging my HDMI cable to rely solely on my basic connector cables, but that didn't do anything for me.)

Good luck all!

Jul 08, 2010 | Insignia 37" LCD Flat-Panel HDTV

1 Answer

Tv turns on picture shows for 3 seconds then screen turns solid green. Sound is present even when screen is green.


I had the same problem on my Sharp LC-32SB24U Liquid Crystal TV. When I couldn't find any solutions on this site, I looked elsewhere on the internet. I found two credible leads.

First, supposedly, this is caused by a known problem with Verizon FIOS. Apparently, there's a problem that Verizon knows about that has to do with the signal between the Set Top Box (STB) and the TV, via the HDMI cable. Other posters on other sites said that the problem is more common with the 7100 series STB's and that the problem is not as rampant on the 6400 series STB's. (Mine is a 7200 series STB.) I have not called Verizon yet, but other posters said that Verizon just says that you'll have to use a set of basic red, yellow, and white cables, versus and HDMI cable, until Verizon gets the bugs out of the system.

The other credible lead revolves around unplugging the TV for two minutes and then plugging it back in. Simple.

Here's what I did, and it worked!
I unplugged the STB and let it sit for 5 minutes. Then, when I plugged the STB back in and powered itself back up, my problem was solved! (Before I did this, I tried just unplugging my HDMI cable to rely solely on my basic connector cables, but that didn't do anything for me.)

Good luck all!

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I called Verizon and exchanged my STB from a QIP 6416 to a QIP 7216 and it solved the HDMI audio problem. This looks like the fix.

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