If you are comfortable doing some small repair work, you might be able to fix this with stuff you have laying around.
All you need is:
1 - 8" piece of coaxial cable with male connector on one end
1 - set of RCA cables (Red/White/Yellow)
1 - coaxial coupler
2 - small wire nuts
the back housing off of your TV. You may have to unscrew the small nut
holding the threaded connector to the TV. This threaded connector
should connect to the motherboard with a male RCA prong that should be
soldered to the component on the motherboard. You will need to
& remove the old soldering & wiggle the
connector off. This is the hardest part, but it WILL come off with a
Now get your coax cable and strip off about 2" of
the black outside housing ONLY. Your solid copper` interior cable
should be protected by a small plastic coating which is covered in
braided wire. You'll need to be careful not to cut the braiding off.
Untangle the braiding down to where your cut stops and try and get it
all on one side of the cable so you can twist it all together and make
a nice wire. Now strip about an inch off of your interior plastic
sheathing to reveal the small solid copper wire on the very inside.
your RCA cable and cut about 6" off of the one yellow side. Follow the
same process above to get a braided sheathing wire and a solid copper
wire. Attach this yellow wire to the coaxial cable by twisting the two
braided wires together and the two solid copper wires together. Use
your wire nuts & electrical tape to secure your connections making
sure none of the wires can touch each other.
Connect the yellow
cable's male prong into the component on the motherboard and attach
your coaxial coupler to the male end of your coaxial cable. If you
saved the small nut from earlier, you can re-attach this new coupler to
the housing on your TV. Screw your housing back on the TV and you
should be good to go.