- 156 -White spots or shadow images (noise)● Check the position, direction, and connection of the aerial.There may be red, blue, green and black spots on the screen● This is a characteristic of liquid crystal panels and is not a problem. Theliquid crystal panel is built with very high precision technology giving youfine picture details. Occasionally, a few non-active pixels may appear onthe screen as a fixed point of red, green, blue or black. Please note thisdoes not affect the performance of the panel.SoundBefore requesting service or assistance, please follow these simple guides tosolve the problem.If the problem still persists, please contact your local Panasonic dealer forassistance.No sound is produced● Is “Sound mute” active? Press MUTE to switch sound mute on or off.● Is the volume set to the minimum?● Check connections and setting of external equipment.Watching > External equipment● Ensure that Speaker Selection is set to TV.Functions > VIERA Link “HDAVI Control™” > Speaker Selection● Ensure that TV Speaker is set to On.Watching > For best audio > Volume settingsSound level is low or sound is distorted● Sound signal reception may be poor.● Set MPX in the Sound Menu to Mono.Watching > For best audio > Advanced settings