Help..!!!!!!

My tv has developed a fault, which is really annoying me. Its about 5 years
old and worked fine until now. The picture is fine one minute then all of a
sudden it will get a yellow tint for about half a minute, then it will be
normal again.



Sometimes if you look carefully, there is a slightly yellow column on the
left of the screen, but its really not noticeable until the complete screen
goes that colour.



Can anyone advise what it could be?



Hope someone can help,



Steve