Sony kp-51ws510 picture problem

Hi I am new here... I have a sony kp-51ws510 television and my color on the tv is screwed up. I have to have the hue set all the way down towards the red otherwise the picture gets all green. I just had a tech over here for an estimate and he said it was the video circuit. That there was a loose solder point or something like that. they wanted to take the tv for 5 days and charge me an arm and a leg. I can solder the point back myself for that matter... Please any help or instruction would be very helpful. Thanks in advance....

Scott