I just thought to mention that in addition to fans, the internal variable iris, which changes rapidly from frame to frame, is also known to cause noises and/or shut down issues in some aging Panasonics, which can easily be mistaken as a fan noise.
In A/V reproduction accuracy, there IS no concept of "accounting for personal taste/preference". As art consumers we don't "pick" the level of bass, nor the tint/brightness of a scene's sky, any more than we pick the ending of a novel or Mona Lisa's type of smile. "High fidelity" means "high truthfulness", faithful to the original artist's intent: an unmodified, neutral, accurate copy of the original master, ideally being exact and with no discernable alterations, aka "transparency".
Last edited by m. zillch; 12-09-2016 at 12:12 PM.