TroubleshootingVQT4W7980Troubleshooting guideTroubleshootingBefore requesting service, make the followingchecks. If the problem still persists, consultyour dealer for instructions.Updating to the latest software (firmware) maysolve the problem. (> 78)The unit is switched to standby modeautomatically.• VIERA Link has worked. (> 63, Power off link)The remote control does not work.• The remote control and main unit are usingdifferent codes. Change the code on the remotecontrol.• Software (firmware) is updating when “UPD/” is displaying on the unit’s display. Wait untilthe update is completed. (> 78)• The HOLD function is activated. (> 79)The followings do not indicate a problemwith this unit:• Regular HDD rotating sounds.• Poor reception due to atmospheric conditions.• Image disturbance during search.• Interruptions in reception due to periodicbroadcasting breaks.• When you switch the unit on or to standbymode, there may be an unexpected sound.General operationThe unit does not work.• Check the connections. (> 12)• One of the unit’s safety devices may have beenactivated.Reset the unit as follows:1 Press [Í/I] on the main unit to switch the unitto standby.• If the unit does not switch to standby, press[Í/I] on the main unit for about 3 seconds.The unit is forcibly switched to standby.Alternatively, disconnect the AC mainslead, wait one minute, then reconnect it.2 Press [Í/I] on the main unit to switch it on. Ifthe unit still cannot be operated, consult thedealer.Unit's displayPress and hold [OK] andthe indicated numberbutton at the same timefor more than 5 seconds.(> 76)