Question about JVC HD-56G886 56" Rear Projection HDTV

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JVC HD-56G886 tuner stopped working

I have a JVC HD-56G886 TV (~6 yr. old) and I have been using an antenna connected directly to the ASTC jack to receive digital broadcast. The picture quality was great and we got over 20 channels OTA. However, it stopped getting any signal when I was testing a new antenna with the TV on. Nothing even after I switched back to the original antenna and performed ASTC auto scan. I also unplugged the TV from the wall and re-scanned but still got no signal at all, zero. Both antennas worked fine with another TV with built-in tuner. Could you please help? Thanks, Jimmy

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My (unfortunate) guess would be the Tuner received a static discharge when you were changing the antennas... this time of the year is bad for static - if you're in a "Winter" climate.

Receivers have a very sensitive FET or MMIC amplifier right inside from the antenna connection to make it better for picking up distant stations.

However, this same "sensitive" amplifier is also prone to being destroyed by even a small static discharge... especially if the tuner had its power turned ON.

Sad to say, it's likely toasted... :-(
(I hope I'm wrong... but you have already tried all other possible solutions)

Posted on Jan 12, 2013

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Posted on Jan 02, 2017

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SOURCE: No OTA channels

This television has an extremely weak tuner. It is very sensitive to both ghosting (multipath) and weak signal conditions, which cause it's digital decoder to "error out". Coupled with this is the decoder's long set-up time (time to actually begin a decoded video stream after signal is selected)and you find that every time the decoder loses sync it takes several seconds to reestablish normal decoding. The net result is the possiblity that the tuner will be continually restarting and never display anything. An extremely directional antenna may help. Otherwise, find a good external tuner box and use that.

Posted on Oct 10, 2007

Taisha
  • 44 Answers

SOURCE: 52G786 ATSC Tuner no longer works

I have the same exact model tv...Love it...ATSC tuners is in definition an Analog tuner. As the broadcasting companies change over to Digital broadcasting before the deadline in Febuary 2009 more and more local or Non-Digital chanels are becoming obsolete. You would have to purchase a converter box for your tv if your not planning on getting cable. Another way to gois if you have an old cable line running through you house (no incomming cable) plug you tv into that jack. That also acts as a antenna. The sweet part of all this is that your tv do have a QAM tuner or Digital tuner built in just need that digital antenna to pair it up.

Posted on Jan 03, 2009

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JVC HD-56G886 56 in. Rear Projection HDTV, Serial Number 11082188. Sound just suddenly went out. We purchased it 6 years old and had a 5 yr. warranty. Right, now we need it, it's not covered. We...


Hi Edwin Robinson,

First of all thank you for contacting Fixya.com regarding your TV problem.

You didn't mentioned if the symptoms remain the same in all inputs, this is to isolate the AV board from fault. If you are using HDMI connection, I would advice you to try the other inputs like input 1-3 at the rear panel and the Audio/Video input at the side panel using the RCA cables. If there's no sound after trying other inputs, then this is an indication that the fault is in the audio circuitry inside the TV.



The DIY steps that I would advice you is to check the resistance of the internal speakers using the multimeter set in resistance measurement. Good speakers will read between 6-8 ohms (for 8 ohms impedance) and you can hear a crackling sound upon testing.

How to test speakers








RCA Cable Connector

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If the speakers are in good condition then the fault either the supply voltage line of the audio circuitry from the power supply board, the audio processor on the main board or the sound output circuitry. This require technical skills because series of test are going to perform to isolate where the fault came from.


Immediate solution.

You can still watch your favorite channel and movies to your TV while the sound is playing through your home theater system or amplifier. Just hooked up the video to your TV terminal jack and the sound/audio to your home theater system or amplifier to bypass the sound from your TV.


Please let me know if you need further assistance.

Have a nice day and take care!

Kind Regards,

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I have a Polaroid TV model FLM-2601, it shows HDTV on the front and I recently upgraded my Cable to HD Service. I have the HDMI cable and see the connection on the Cable Box, however, I can not locate a...


Unfortunatly Poleroid is a very economic set and Since there is no built-in ASTC tuner you will have to connect HD sources via the component or DVI jacks. You will ned a plug that is HDMI to component or DVI to get your service.

Jun 09, 2011 | Televison & Video

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It's staying on 480i sd why not 1080i


There's only one way to get that TV to switch from 480i (which is an SD or Standard Definition signal) - that's to provide it with an ED or HD resolution signal (a 480P signal is often called ED or Enhanced Definition while 720P, 1080i and 1080P signals are called HD or High Definition).


steve_con_14.jpg
The old standard yellow composite video cable.
.
You will not get ED or HD signals through the old composite RCA phono jacks (usually yellow in color), either. You'll need to use an RGB (red, green and blue) component video cable, HDMI cable, DVI, or other type supported by both your TV and the video source (CATV box, Blu Ray disc player, Satellite converter, etc.). More on this, later.
steve_con_15.jpg
RGB cable.

steve_con_16.jpg
An HDMI cable - this provides Digital audio signals, too.
.
steve_con_17.jpg
A DVI cable.
.
First, you'll need a source capable of sending ED or HD signals. This can be a progressive scan DVD, Blu Ray player, HD Cable or Satellite converter, or a simple TV antenna. Not all DVD players are capable of the 480P progressive scan output - it must be labeled as such. The DVD movies are not labeled progressive scan as they all will play back at 480P if played in a DVD player capable of progressive scan, otherwise they play at 480i. A stand alone Blu Ray player or one in the Sony PlayStation 3, the older HD-DVD in the Xbox360, (it is important to note that the Nintendo Wii can output either 480i or 480P signals only when connected with their special component video cable), "set top boxes provided when you choose HD service from your local cable provider or satellite TV provider are the main sources for signals better than 480i. As mentioned above, the old standard yellow video jack is not capable of supporting signals better than 480i. You must use the HD jacks and cables between to get these signals into your TV.
steve_con_18.jpg
The Wii 480P cable assembly - includes stereo audio, too.


Lastly, if your TV has an ATSC tuner (it is not uncommon for it to have an NTSC tuner and CATV tuners as well), you can input a UHF antenna directly into the the antenna terminals on the TV. Broadcasters in most areas have been moved into UHF bands - but some areas have one or two that operate in the VHF bands still. Check antenna web for information and help selecting antennas and broadcasters in your area. The nice thing about the antenna method is that no other cables, converter boxes, etc are needed to enjoy HD signals - plus - they're free!

Just remember you need a source capable of ED or HD signals and a way to get those signals to your TV. The yellow composite cable is from days ago and only passes 480i signals.

I hope this helps and good luck! Please take a moment to rate my reply - thanks!

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Im trying to hook my standard antenna up to my jvc av 56p585. i dont have manual. and i cant get any channels. what do i need to put my tv on to get my basic local channels


This JVC TV has an NTSC (analog) tuner. So it can only receive some of the few remaining low power tv stations that are still using analog transmitters. Depending on your location, you may not have any of these stations within the range of the antenna.

You need an digital-to-analog tuner to get additional channels. Use tvfool.com or antennaweb.org to check for stations in your area and the appropriate direction to point that antenna. (You may need an amplifier since digital stations are either sufficient signal for the tuner to use or you get "no signal".)

Please note that the d-t-a tuners that were available with the government coupon cards only handles standard definition signals (480i). The HD tuner digital to analog converters are available at some online sites but cost more.

I hope this helps.

Cindy Wells
(you can use a tuner in your computer (USB or PCI card), but you will need a converter unless your video card can put out a signal other than RGB. The HDMI port on the TV will not interface directly with a computer.)

Nov 06, 2010 | JVC Televison & Video

1 Answer

JVC HD DILA 56G886. replaced lamp and now it shuts down after 10


we found that it is an auto shut off system on the TV due to over heating. The lamp, if not cooled correctly shuts down. We added a mini fan in the back and it seems to work fine now.

Jan 25, 2009 | JVC HD-56G886 56" Rear Projection HDTV

1 Answer

52G786 ATSC Tuner no longer works


I have the same exact model tv...Love it...ATSC tuners is in definition an Analog tuner. As the broadcasting companies change over to Digital broadcasting before the deadline in Febuary 2009 more and more local or Non-Digital chanels are becoming obsolete. You would have to purchase a converter box for your tv if your not planning on getting cable. Another way to gois if you have an old cable line running through you house (no incomming cable) plug you tv into that jack. That also acts as a antenna. The sweet part of all this is that your tv do have a QAM tuner or Digital tuner built in just need that digital antenna to pair it up.

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JVC HD-56G886


Call your cable company, the lamp has nothing to do with the inputs, Maybe one of the connections is barely connected from moving the TV to replace the lamp.

May 06, 2008 | JVC HD-56G886 56" Rear Projection HDTV

1 Answer

No OTA channels


This television has an extremely weak tuner. It is very sensitive to both ghosting (multipath) and weak signal conditions, which cause it's digital decoder to "error out". Coupled with this is the decoder's long set-up time (time to actually begin a decoded video stream after signal is selected)and you find that every time the decoder loses sync it takes several seconds to reestablish normal decoding. The net result is the possiblity that the tuner will be continually restarting and never display anything. An extremely directional antenna may help. Otherwise, find a good external tuner box and use that.

Oct 03, 2007 | JVC HD-52G886 52" Rear Projection HDTV

2 Answers

HDMI input


The green screen is caused by light hitting the back of the tv. Either move the tv to a location where direct sunlight will not hit it or put up strong curtains. As for fixing the problem, do a search for JVC green screen reset on AVS Forum, its easy to do just dont have the info with me now. Keep in mind if direct sunlight hits the back of the tv it will do it again. I have put up some good curtians and ensure not to open them when watching the tv. Hope this helps. I am Hayward, have a nice day.

Aug 21, 2007 | JVC HD-56G886 56" Rear Projection HDTV

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