En este foro existe este hilo, con 500 respuestas, habla de ese modelo Panasonic:

http://www.avforums.com/forums/showthread.php?t=93429

y empieza con estos problemas.

Well for starters:
- "Black crushing" when viewing DVDs via RGB, where all shadow detail is lost and replaced by black. Noticed by large numbers. Doesn't appear to happen if the DVD player is capable of progressive scan (PD30 RGB problems thread has more detail). On some (earlier?) sets this is more extreme than others and can affect component input, and on the sets where it is at its worst overall colour/brightness stability seems poor as well (dull scenes too dull, colourful scenes too colourful). 5 mins into Attack of the Clones is a prime test for this.
- Overall green colour cast, seen by large numbers, fixable via service menu
- PAL progressive scan images off centre resulting in an white band, seen by several, fixable via service menu
- Pink stripe on side of screen, reported by one person
- Lack of sharpness, reported by one person
- Dirty screen effect highlighted when watching sport, seen by me on two successive sets (awaiting third!) and one other person
- "SVM" cannot be deactivated, reported by those who know what SVM is
- some reports of horizontal banding when brightness is set very high
- a report of banding from an HK25 dvd player when in progressive
- a report of a buzzing noise

No estaría de más controlar esos detalles o leer el hilo - en inglés - para ver como fue la cosa.