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unless you have excellent desolder and soldering skills plus the special tools needed, you will have to replace the board that the broken connector is on. Or use a cable box/satellite box and the component, composite, or HDMI input
You can buy the RF jack and solder it back onto the tuner as long as the tuner has not been damaged beyond repair. Inside the tuner the center conductor from the jack solders into the printed circuit board. If any small parts are broken or missing then you will have to replace the tuner.
If the board is not cracked,a qualified technician may be able to sloder another coaxial jack for a service call charge. Look carefully with a flash light........if you see the small board is cracked.....it will need the tuner and could cost $200. You may be able to cicuimvent by hooking your cable box or satellite box into the video inputs instead......select with input button on remote and should work fine with no repair at all
Buy a $4.00 1/8" jack replacement from Radio Shack - part # 274-0869, which has small screw connectors that don't need soldering.
Strip about 1" of the braided insulation at the old jack end, which will expose 4 very small wires: Blue, Green, Red, Copper.
Attach the Green & Copper wires to the tallest pin on the replacement jack.
Attach the Red to the shortest pin, and the Blue to the medium pin.
Remember to slide the jack cover onto the headphone cord before attaching any wires!
Repair can be made if you use the utmost care. Do not remove tuner (steel case). Open side closest to screw jack and remove other side,may be soldered. Observe the the center lead and how damaged the pc board is. Use solder and thin wire, strip a twisted wire till you have one strand and repair board and solder the outer metal to the tuner can. Then presto TV again! Good Luck be safe..
I finally managed to pull back the rear cover by inserting a thin piece of metal at the top of the rear cover. It snapped off by pulling it backwards and then downwards. And I soldered the connector back on. I only had to solder the 4 feet of the small metal shield, the contacts are just pressing on the circuit board.
Unfortunately, that coax connector is almost certainly crimped onto a cable inside.
You might want to pull off the back panel to see if that internal cable is screwed onto another jack on the chassis.
If so, you can disconnect that end and substitute another cable, they come in several different lengths and are not critical.
Any electronics store will have them.
If it isn't equipped with a connector inside, you will need to have someone unsolder the defective cable and install a new one.
Since you have a surround sound system, you probably should just bypass the TV's audio.
Connect the red/white plugs from your digital cable box to one of the inputs on your surround sound system but not the Phono input unless the Phono input lists something aside from Phono, like Aux/Phono or CD/Phono.
Connect the S-Video or composite (yellow) video plug from your digital cable box directly to the S-Video or composite (yellow) video jack on your TV.
If your digital cable box does not have a S-Video (4 pins and flat rectangular hole) or Composite (yellow RCA jack) jack and only has the screw/push-on type cable with the pin in it, then leave the remaining connections as-is.
Now switch your surround sound system to the input you connected the red and white plugs to and turn on your TV. You should see picture from the TV, but hear audio from the surround sound system.
I assume you are speaking of the sensor (on the TV) which picks up the remote box commands, or the infrared LED (on the remote) which transmits the commands. Which ever the case, it sounds like a broken & intermittent solder connection where the device solders onto the circuit board. Most of problem I've seen is the remote box end of things.
You will need a solder iron, solder, and a little soldering expertise to fix this. The remote box might have one or two screws, otherwise the case is usually a snap together, and sometimes frustrating to get apart.
If the TV end of things, then you must unplug the set, take the back cover, and carefully remove the main chassis, and note where the sensor is.