Lines across the screen

top half missing is in vertical circuit of set---if it is a 27 inch and this old consider retiring it and replacing----other option is consider having a shop repair it--a rough guess would be as high as 150 dollars parts and labor is possible for your problems.

Do these lines disappear after the set warms up a little? If they don't then you most likely have bad buffer boards(X buffer or Y buffer). Sometimes it is also caused by a bad panel. Since your tv is less than 1 year old and is still under the 1year manufacturer warranty I strongly suggest that you contact the manufacturer for repairs.
Contact info:
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Thanks,
Sai.

hi this fault could be the convergance ic also the resistors and capacitors need to be checked, thanks

shaun

put a towel across the top of the tv so it can heat up faster and you will get your picture. be carefull!!

The original white line problem was caused by improper adjustment of the vertical size for which there is an internal adjustment. The current problem could come from two different sources, one an adjustment again, the other from a capacitor that is losing capacitance and gaining losses; = sick.
If you are fortunate enough to have a surviving TV repair in your area, none of these problems is expensive to find or correct.
Don't be surprised to find the only TV shop operating out of a messy garage since those of us doing this kind of service are dying off and the price one can charge for labor has shrunken to the point that a real business address is too expensive to have.  

This is usually caused by bad capacitors in the vertical circuit. If you have an electronics background you should be able to find the defective ones with an ESR tester .

take it to a tech.because the diagonstic is dangerious and it won't be a simple job.could be everything & anything electronic.

you have a shorted green CRT that is affecting the other crts the short is internat to the crt that leaves what is called retrace lines. if the set is more than three years old then replace all three guns.

hi there, you do have a vertical section problem and at the power supply section problem. do some test, check for some cold solder at the power supply section, test some electrolytic capacitor at the vertical section. ty

There is a large metal case behind the input board in the back of the set called the hyper board that needs to be replaced.Good Luck