Usually it does mean bad caps or resistors. But if you are watching a DVD they show on top because of the anti copy protection that is encoded into the DVD. The lines then will come and go like every 30 seconds. Also, if the CRT has a short it can cause retrace. what are you using for a source on this set? VCR, DVD ect.... 
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Kyocera R-661, Yamaha RX-V2200
National Panasonic SA-5800
Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20
Pioneer SX-939, ER-420, SM-B201
Motorola SK77W-2Z tube console
McIntosh MC2205, C26
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