My lg Lm3700 has sound but no picture but the tv screen is bright not dark whats the problem and is it a eady fix

Solution
Is this connected to another device such as speaker or audio receiver? If yes, please make sure that cables are plugged in correctly. If not, check with a local repairman for a possible issue with the main board and ask for further diagnosis.
Is this connected to another device such as speaker or audio receiver? If yes, please make sure that cables are plugged in correctly. If not, check with a local repairman for a possible issue with the main board and ask for further diagnosis.
 
Solution