53FAQs, etc.Frequently Asked QuestionsNo sound is producedSound is unusual• Are the speakers’ cables connected correctly? (p. 40)• Is “Sound Mute” active? (p. 17)• Is the volume set to the minimum?• Is “Speaker output” set to “Off”? (p. 26)• Change “SAP” settings. (p. 20)• Check “HDMI 1 in” or “HDMI 2 in” settings. (p. 26)• Set “SAP” setting to “Stereo” or “Mono.”• Check the HDMI device connected to the unit.• Set the audio setting of the HDMI device to“Linear PCM.”• If digital sound connection has a problem,select analog sound connection.Problem Actions“Press any key to return”moves on the screenScreenOne spot remains darkChaotic image, noisyNo image can bedisplayedOnly spots are displayedinstead of imagesNeither image norsound is producedIf there is a problem with your TV, please refer to the table below to determine the symptoms, then carry out thesuggested check. If this does not solve the problem, please contact your local Panasonic dealer, quoting the modelnumber and serial number (both found on the rear of the TV).• The function to prevent “Image retention” is activated.(Not a faulty symptom)The screen saver is activated if the TV unit is not operated fora certain time in SD mode.“Image retention” (p. 5)• A pixel or luminescent spot can occasionallybe missing in plasma displays.(Not a faulty symptom)• Check nearby electrical products(car, motorcycle, fluorescent lamp).• Check Picture menu (p. 26)• Check the channel settings. (p. 34)• Check the antenna cables.• Is the AC power cord plugged into the outlet?• Is the TV unit turned On?• Check Picture menu (p. 26) and volume.• Are the remote control codes correct? (p. 43-45)Black Box appears • Change settings of Closed Caption (CC). (p. 36)Sound