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Our tv, model 42hp25bat, has been running on our cable input for the past year. All of a sudden the tv input setting says "no signal". The tv works for our DVD player on HDMI setting. We checked the cable connection on another tv and it worked fine so it's not our cable service or the actual cable line. We confirmed the cable is connected firmly to the tv set. Once we confirmed the cable service was ok and reconnected the line, the sound stopped working for the DVD player.

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The signal input on the cable connection to to your tv (inside your tv) is broken, and possibly needs to be replaced. Possibly few capasitors or other parts might need to be replaced. or the whole signal board.

Posted on Apr 17, 2008

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Our jvc tv model #HD-70GC78AAA says weak signal


Its possible its the signal source (cable, satellite etc) if using the coax input--the tuner in the set could even be bad.

If rear inputs for DVD etc function well you may be able to get around this with a box with outputs for those inputs on the set--bypass the problem.

Dec 16, 2012 | Projection Televisions

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Hi,
Problem seems with main tuner in this tv as other AV inputs working fine so please replace main tuner (TU2) to solve this issue.
There are two tuners mounted on A board TU1 and TU2, please replace TU2 and part number would be written on tuner itself.
TV is approx 10 years old so I would recommend that do not spend lots of money on it.
Thanks.

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May 26, 2009 | Projection Televisions

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Pixelation


This model has been known for problems with the Hyper module but the picture would be affected with any input source.HD or not.The cable converter box and the cable signal are the only culprits for pixilation.Pixalation is the result of missing digital information via signal.If it is only appears on the HD signal I would suspect the cable signal or the converter box.I assume you are using your component input on your TV or the HDMI input.As a technician I would suspect the cable box or cable for pixalation.

Jan 19, 2009 | Toshiba 46H84 46" Rear Projection...

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Philips 55" HD projection TV


I have been working on solving this problem for a few weeks now myself. I have even purchased 3 broken sets and one good one so that I can do board swaps and test repairs. I have a good idea of what may be causing the problem but the details are too long to put in this thread. Goto the site www.tvrepairkits.com and use the contact us button to send me an email. Include your chasis number or model number. After I receive your message  I will send you an email with some things to check. Hope this helps

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The coax should go from the wall to the cable box to the TV, just like you have it. Then you should run audio only (L and R RCA) from the cable box (if it has it) to the amp. Don't worry about running a video signal to the amp.

Sep 06, 2008 | Projection Televisions

1 Answer

No video in any of the TV inputs


first try resetting and rebooting. reset = menu, 2470, enter.
reset is press reset button and wait for green lite to stop blinking.
if that takes care of it great. if not it sounds like a signal board or dm problem and will need repair. check out www.tv-techs.com

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Was an auxillary input accidently selected? Try selecting inputs to see if this straightens it out. What model set do you have?

Feb 03, 2008 | RCA R52WM24 52" HDTV Projection Television

1 Answer

Component Video inputs do not work


I started back in the day of tubes. A family would have one set and it would be a 19" black and white. There are different resolutions now. The components probably do work, but, they don't pass the 480i signal. The satelite converter's analog signal needs to be set to 480p and the DVD needs to be set to progressive if it does have that setting. If the DVD is not a progressive scan DVD, then, the only inputs that it will show on is the analog signal. Some of the dish converters have a switch on the face for changing the resolution. If yours doesn't then put it in an analog source and go to the menu and change it there. Then move it to the component input. Hope this helps.

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Your problem could be the cable: A. A weak signal coming from the cable company B. A bad cable or connector within the house. For the above, call the cable company and ask them to check the signal levels on your block. And, remove the plate where the cable comes out of the wall and look for shorted or bad wiring that may cause a weak signal. Also, if you have another set in the house, connect it to the same cable outlet to see if it has similar audio blackouts. Your problem could be the tv set itself, as well. C. Go into the on-screen-display and make sure you are on stereo audio and NOT SAP. SAP settings are not to be used unless you are using the second language or audio program feature. D. The sound detector inside the set could be defective. Which would require service. So, the first thing to do is to determine exactly where the fault lies; inside the set or outside the set. Then attack the problem at hand. If the set is defective internally, I think you will need a tv tech who can diagnose the problem; it must be tested and measured to find out the exact part (this set has over 3,000 compnent parts inside).

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