Hi! my philips 28" tv which was giving erratic picture and making a buzzing sparking sound. from usenet posts & faq, found the noise was coming from the crt socket. i carefully opened the crt socket & cleaned contact which clamp on the input wire.this socket had a spark gap built in with 2 metal hemispheres. on 1 side of the spark gap i noticed a tiny glob of metal which fell off on cleaning. TV is now working. No more sparking noise! but the picture is slightly less focused - it is hard to read tiny text (like satellite channel info) on the screen. & there is a very faint narrow almost horizontal line every inch over the entire screen.
what cause the socket failure? what is causing this line? did i need to re set the focus after cleaning the socket?
Many thanks X