What can cause the tv picture to have waves lines

SOURCE: some part of tv has been fused causing no picture

if the screen is real bright green with thin small white lines in it its probably a shorted picture tube. Or a shorted Green driver Transistor. Good Luck

SOURCE: Philips TV showing horizontal lines model 27pt6441/37

You likely have an elevtrlytic capacitor bad on the B+ line to the vertical ouput ic. If you continue to use the set like this it is likely the vertical ouput ic will fail.

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SOURCE: Picture on RCA TV shrinks to a horizontal line

Hello,
Sounds to me you have a cold solder joint ( loose solder connection ) on the printer circuit board around or on the vertical chip or on one of the vertical capacitors. You may also have a bad vertical chip or a bad vertical capacitor, but I doubt it since it did come and go. I'de get a soldering iron and some solder and touch up the connections. I will remind you that you need to always excersise saftey by making sure, before removing the back, unplug the TV from the wall, and use care not to come in contact with the large red wire going to the back of the picture tube as the picture tube can be turned off and still store lots of voltage ( up to 35,000 volts). Always stay safe and when soldering, use care not to run solder across places that will make a short.
Good Luck and I hope this helps
Ed Meshechek ( Radio Man )
NC Electronics
Mills, Wyoming
307-266-4675

SOURCE: Panasonic 32 inch TV has horizontal lines across screen

REPLACE VERICAL OUTPUT IC ' LA7838

SOURCE: CRT TV picture keeps getting horizontal line & loud cracking nois

the horizontal section is near collapse, the lines indicate a sort or leak. Soon, the set will go black. Shut off as repair will be cheaper now! Needs professional repair as High voltage section is dangerous.. Unplug to be safe!