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I presume you mean PIP which is picture in picture---the only button which will control it is on the original remote--PIP, SWAP etc.
The set uses two tuners inside for this--one is main and other is PIP--you may have a bad tuner.
If PIP button brings up a screen--hit the swap to see what happens-if one is nothing or snow and other has a picture--got a bad tuner--it can be either (some are combined into a single tuner).
It sounds like a problem with the tuner in the set.
Every set with PIP has either a dual tuner or one for PIP and another called Main.
To prove what your problem is hook the set up from the cable box to one of the video inputs and see if it works that way; also if a DVD or blue ray work via the rear inputs it is a tuner problem.
If set actually has 2 tuners (one for PIP and the other for main} it can be either tuner causing the problem as they are interconnected.
Confirm no problem when av inputs are used.
Even if you do not use a cable or satellite box now, that way would cost you little compared to having a tuner replaced.
Let me know if you have questions with a comment posted here, the site will email me, it is not fast but let me know if you have questions.
PIP uses the signal from a second tuner to insert a small or split-screen image on the main image. Some TVs have two tuners but most PIP applications need a signal from a VCR tape or tuner (tuner must be digital since 6/12), a DTV box, or a cable box for TV programs. A DVD player can also provide a signal for PIP if a DVD is playing. However some TVs will not allow PIP if the signal inputs are through the HDMI ports.
If the main channel input is not giving you a picture, you need the tuner checked out or replaced. a good indicator is when you select a channel with the remote you will get just snow(sometimes followed by static in the audio)you do get the picture in picture thru the auxiliary inputs on the tv because they go directly into the audio and video drivers and bypass the RF circuitry. One way of making sure that the tuner is the problem is by hooking up the coaxial out of a vcr or dvd player to the main in or cable in of the tv and selecting channel 3 on the tv and then try a tape or a disc, if you get a picture then suspect something crossed in your installation between pip and main in of your tv set.please your feedback if i answered your question.thanks!
Sony's have dual tuning systems to allow for the separate PIP channel. The common problem on the Sony's is the circuit board and tuning module connections go bad. It is likely that the connections on the board or module were already in the decayed process and moving it just accelerated the issues that were inevitable.
The quick fix is to swap the PIP over to the main picture or to bus the antennae signal to the antennae B terminal thus bypassing the bad tuner module.
The recommended fix action is to have someone with soldering skills to remove the chassis, and locate all the cold and cracked solder joints, especially near the tuning modules. If this does not take care of the problem, the tuning modules will need to be removed for re-soldering on the actual tuner modules.
If none of the above works, then you can always use the audio/video outputs of a cable box or vcr to the a/v jacks of the tv, thus bypassing both tuners in the tv.
What I hear you saying is that your main television tuner shows lines only while the PIP is functioning properly. The PIP works by using a separate tuner from the main tuner of your television (like a vcr tuner). Since the PIP works then it appears that your main tv tuner is not working anymore. It will probably have to be replaced. I recommend looking at our online technician list for a professional near you.
PIP requires either multiple tuners, or another video source. It sounds like your tv lacks another tuner. Does the tv have inputs for, say, a vcr? If so, connect a vcr to it, play a video, and then select PIP. It should display the video and tv simultaneously.
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