lg rz-50py10 weired problem ?

[mzone]

i have a weired problem on the ysus on a lg rz-50py10  theres colored blotches on screen however if i use a hairdryer on around this area ( see picture ) if i hold hairdryer for 5 seconds around this area the picture will come on fine and tv will work as normal?

i have looked at surrounding area everythink looks fine, just cant seem to pinpoint which component it is in this area, as works perfect if i use a bit of heat in this area for a few seconds but pictures blotchy again if i try and start tv from cold ?  

anyone any ideas ?