Question about Toshiba 43H70 43" Rear Projection Television

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Tuner problem? The first the tv quit working on the built in tuner, but still worked fine using the composit inputs. Now, they don't work and the tv will stay on for a minute or 2 then turn off and the red powert light blinks. The minute or 2 that it is on, all channel numbers, menu items, etc are doubled in red and green and with what appear to be red, green static bars on tv screen...Any Ideas,,,,,Thanks Shawn

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Re: tuner problem?

The programmable ic develops a solder all loose parts on the board.

Posted on May 03, 2008

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I have a rca d52w23 no caoax hookup what part do ineed to make my tv cable ready

The model you listed does have a built in tuner so there should be a connector on the back where cable TV would connect to. A very common issue on these sets is the connector often breaks off rendering the tuner useless and therfore requiring replacement of the tuner itself. You can use a cable box and connect it to either the component or composite inputs on the back of the TV. I hope that helps : )

Jul 25, 2011 | RCA D52W23 52" HDTV CRT TV

1 Answer


Does it use a cable box or are you using the tuner in the TV?

If you're using the tuner in the TV, try unplugging it for 5 minutes and then plug it back in, do a new channel scan and see if the CC goes away. If not, contact JVC to find out how to reset it. If it still does not work, you might need to have your main board replaced.

If you're using an external tuner plugged into a video input port (such as a cable box or satellite box) then the external box is at fault since TVs don't have CC available through their composite or component or svideo or hdmi ports.

Jun 19, 2009 | JVC HD-52G787 52" Projection Television

1 Answer

RCA HD52LP: Composite video inputs don't work

RCA Authorized service tech looked at it. He determined that the DM Module need to be replaced. The part alone costs $550 + labor. Since the HDMI and component video inputs seem to work, he suggested buying a VCR DVD combo with HDMI output which would be far less than repairing the tv itself. I'n researching the possibility of purchasing the part myself.

Jun 08, 2009 | RCA HD50LPW42 50" Rear Projection HDTV

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Channels won't come in

Hello divalisaf,

These are a few things I want you to check first.

1) Make sure the cable set top box is on and the cable is connected to the TV properly (This may seem simple but I have had to charge many people a $60.00 service fee plus a $70.00 travel fee just to turn on a cable set top box)

2) Make sure the TV is set to the proper input you are using (RF( F connector) , HDMI, Component video, and or Composite Video)

3) Make sure the TV is set to the proper channel (either channel 3 or channel 4 depending on your area) The cable set top box should be action as your tuner.

If all of these conditions are met, then we can begin troubleshooting.

First determine if the other inputs work (HDMI, Component video (RGB), Composite video (yellow), s-Video (6 pronged black cable).
If the inputs work then you possibly have a tuner problem
If the inputs don't work then then problem is likely in the video microprocessor.

If the problem is in the tuner or the connective circuitry then we will have to determine where to get a replacement tuner (or you can just use one of your other video inputs)

If the problem is in the video section (which includes the microprocessor) we are going to have to troubleshoot the video section which will involve you having a background in electronics, if not I would suggest having a qualified TV technician perform service on this TV.

I hope this helps,

Thank you,


Nov 25, 2008 | RCA HD56W66 56" HDTV

3 Answers

RCS Scenium

What is your TV input connection? Are you using Antenna? Cable? Dish?

The Unusable Signal sounds like the TV is not getting a signal. Does your TV have a built in HD Tuner?

If you are using Antenna you might want to try setting up the connections and it should search for quality channels that you get good signal strength. If you are on channel 2 and there is no over the air channel 2 it may say "unusable signal".

Sep 24, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

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Toshiba TN55X Convergence problem.

You brought up an issue that we hadn't considered. Shortly after hooking up our TV to the receiver with a composite video, our convergence which wacko. My hubby replaced the 2 ICs, but now our power button just flashes red, with no picture. Not sure if new ICs are faulty or if it's another issue. He will replace old ICs to see if problem still exists with turning on the tube. And he'll try disconnecting the video signal to see if problem exists.

Ouch.. may have to consider another tv thanks to new technology ??????

Good luck solving your problem.

Jul 06, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Green screen

If the TV works ok using the component,composite and tuner inputs otherwise then the HDMI module is bad.

Nov 25, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Composite and s-video inputs stopped working

You may have shifted the input board a little while replaceing the IC's. Double check every plug and connector, not just by visuale inspection, but by going and removing and replacing every connector. I have had problems like this in the pasy and have learned the hard way, everything is not as it looks. Good Luck

Jun 04, 2007 | Philips 60PP9202 60" Rear Projection...

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Weak Signal ..

Sounds like you have a bad tuner. The most likely cause on these RCA's is a loose RF antenna input connector. A bypass for now is if you have a VCR use it as the tuner and then connect it to the TV using the composite video inputs. If that faisl as well then you have a bad signal board.

Feb 12, 2007 | RCA HD52W140 52" Rear Projection...

1 Answer


yes it could ba the cable itself even, but i suspect more the tuner circuit or tuner itself may have bad solder connections. Here is another test for you to try, plug another dvd or vcr, or xbox etc. into the back, using one odf the inputs. See if this works like the built in dvd. if so it will be more likely bad connections in the tuner or surrounding circuit. good luck.

Dec 17, 2006 | RCA HD52W56 52" Rear Projection HDTV

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