- 29 -ReferenceReferenceTroubleshooting guideBefore requesting service, please perform thefollowing checks.If the problem remains unresolved, consultyour dealer for instructions.∫ Unit does not respond to remotecontrol or unit’s buttons.Disconnect the AC mains lead, wait 1 minute,then reconnect the AC mains lead.The following do not indicate a problem withthis unit:– Regular disc rotating sounds.– Image disturbance during search.∫ Cannot eject disc.1 Turn the unit on.2 Press and hold [OK], the yellow button andthe blue button on the remote control at thesame time for more than 5 seconds.– “00 RET” is displayed on the unit’s display.3 Press [1] (right) repeatedly on the remotecontrol until “06 FTO” is displayed on theunit’s display.4 Press [OK].To return to the factory defaults.¾ Select “Yes” in “Default Settings” in the Setupmenu. (> 28)To return all settings to the factory preset.¾ Reset the unit as follows:1 Turn the unit on.2 Press and hold [OK], the yellow button andthe blue button on the remote control at thesame time for more than 5 seconds.4 Press and hold [OK] for more than 5 seconds.The remote control does not work properly.¾ Change the batteries in the remote control.(> 5)¾ The remote control and this unit are usingdifferent codes.Press and hold [OK] and the displayednumber (“”) for more than 5 seconds.The TV tuner mode is not displayed when theTV is turned on.¾ This phenomenon may occur, depending onthe TV setting, when “Quick Start” is set to“On”.¾ Depending on the TV, this phenomenon maybe prevented by reconnecting the HDMI cableto a different HDMI input terminal or bychanging the HDMI auto connection setting.This unit is turned off automatically.¾ To save on electricity, this unit is turned offautomatically if there is no button operationfor about 20 minutes when not playing back(such as when paused or displaying themenu, displaying still pictures, etc.).You have forgotten your ratings password.You want to cancel the ratings level.¾ The ratings level returns to the factorydefaults.1 Turn the unit on.2 Press and hold [OK], the yellow button andthe blue button on the remote control at thesame time for more than 5 seconds.4 Press [OK].The TV screen turns black.¾ In the following cases, HDMI authenticationtakes place and a black screen is displayed:– When “24p(4K)/24p Output” is set to“24p(4K)” or “24p”.– When the display is switched between 2Dand 3D images.– When you quit the 4K playback of a stillpicture by displaying another screen,including the HOME menu.Do you have the latest firmware installed?Panasonic is constantly improving the unit’sfirmware to ensure that our customers areenjoying the latest technology. (> 14)– Image disturbance when replacing 3D discs.General operation– “00 RET” is displayed on the unit’s display.3 Press [1] (right) repeatedly on the remotecontrol until “08 FIN” is displayed on the unit’sdisplay.If “SET ” is displayed on the unit’s displaywhen a button is pressed on the remotecontrol, change the code on the remotecontrol.– “00 RET” is displayed on the unit’s display.3 Press [1] (right) repeatedly on the remotecontrol until “03 VL” is displayed on the unit’sdisplay.