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Normally grainy pictures are a result of poor ground connections, although usually for more than one channel. Check the cable connections first. Otherwise all I can suggest is to have the tuner replaced.
Check is RF Antena/ Cable connected? If yes, go to TV Menu and select Auto-Program. TV will start tuning and search all available channels on cable/ on-air. If there is no channel reception, TV has defective Tuner. If you know basic electronics knowledge, replace the Tuner or contact nearest Sony repair shop.
sarge, it sounds like the vertical output IC went bad on you. If it was a bad connection or a bad capacitor, your picture would have been a straght line across the screen. They call the output section of the IC a push-pull type of amp, so the top half of the sweep IC went out. If you have had some soldering experience, and or experience with solid state repair, locating the bad IC and replacing it is no big deal. If you havent, stay safe and call in a pro to assist you in this repair, as there is alot of high voltage inside this puppy that is still present even if the set is unplugged. It should not cost an arm or a leg to repair this set. An honest repair on a set like this if you take it in should not exced 125 to 150 bucks. Good Luck
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Make sure the TV setting is set to or .
A power surge may have reset your ?cable-ready? TV. Check the cable setting on your TV and make sure it is set to or .
If a VCR is connected:
* The VCR needs to be on channel 4.
* VCR may not be ?fine-tuned? to channel 4. Locate and adjust the fine-tuning mechanism until the picture comes in clearly.
* The <3/4> switch may be in the wrong position. Locate the switch on the back of the VCR and set it to <4>.
If a converter is connected:
* Make sure the TV is on channel 4.
* TV may not be ?fine-tuned? to channel
Locate and adjust the fine-tuning mechanism until the picture comes in clearly.
* Determine if the converter is bad. Locate the cable wire coming in to the room and connect it directly to the back of the TV. If the picture is clear, your converter needs to be exchanged. Give us a call or stop by your local office and we?ll switch out your equipment.
Check the fine-tuning of your TV