nec tv prob

[crazy frog]

i have a nec 6807s.

when first turned on it has colour
wave lines, thay turn into ladders
accross the screen and then vanish
but if you blow cold air into the back
the line return.

can anyone help
thanks

 

[john]

allready done that and no win.
is it pos it maybe a ringing coil or
tranny.