First, try a reset. Unplug the power cord for a few hours and try again. 
Second, try the jiggle and wiggle test; just shake the set around or bang it with your fist to see if the cause is from a loose connection.  Wiggling and jiggling the set can often wake up a bad internal connection or cold solder joint. 
Finally, if you cannot fix it I suggest you  try the local thrift shop. I see good working used tvs all the time for under $20.  On senior day or special sale days they are sometimes as low as $5 or this size.
Unfortunately, if the repair is serious it will cost more than replacing it with a used one.  A new LCD flat panel set will be much, much more to replace; more like $250 and up.
If you need a technician service , you can visit this website www.tvrepairjacksonvillefl.com and have more details of this repair
                
 gerard
                
 December 2012