Sony LBT-GPX77 Operating Instructions - Page 33

Troubleshooting Should you encounter a problem with your system, find your problem in the troubleshooting checklist below and take the corrective action. If the problem persists, consult your nearest Sony dealer. Note that if the service personnel changes some parts during repair, these parts may be retained. If "PROTECT EXX" (X is a number) appears in the display panel Immediately unplug the power cord, and check the following items. • Are you using only the supplied speakers? • Is anything blocking the ventilation holes of the unit? After checking the above items and fixing any problems, plug in the power cord again and turn on the system. If the issue persists, consult your nearest Sony dealer. General The clock or timer setting is canceled. • The power cord is disconnected or a power failure occurred. Set the clock (page 14) and timer (page 29) again. There is no sound. • Adjust the volume. • Check the speaker connections (page 10). • Check the connection of the optional equipment, if any (page 10). • Turn on the connected equipment. • There is no audio output during Recording Timer. There is no microphone sound. (MHC-GPX88 only) • Adjust the microphone volume. • Make sure the microphone is connected to the MIC jack correctly. • Make sure the microphone is turned on. There is severe hum or noise. • Move the system away from sources of noise. • Connect the system to a different wall outlet. • Install a noise filter (commercially available) to the power cord. • Turn off surrounding electrical equipment. The timer does not function. • Check the timer setting and set the correct time (page 29). • Cancel the Sleep Timer function (page 29). The remote control does not function. • Remove the obstacles between the remote control and the unit. • Move the remote control closer to the unit. • Point the remote control at the unit's sensor. • Replace the batteries (R6/size AA). • Move the unit away from the fluorescent light. There is acoustic feedback. • Reduce the volume. • (MHC-GPX88 only) Move the microphone away from the speakers or change the direction of the microphone. "CHILD LOCK" appears when you press any button on the unit. • Set the Child Lock function to off (page 31). Additional Information 33GB