TROUBLESHOOTING42 EnADDITIONAL INFORMATIONRefer to the table below when this system does not function properly. If the problem you are experiencing is not listedbelow or if the instruction below does not help, turn off this system, disconnect the power cable, and contact the nearestauthorized Yamaha dealer or service center.■ GeneralTROUBLESHOOTINGReceiver (R-840)Problem Cause Remedy SeepageThe receiver fails toturn on or entersstandby mode soonafter the power isturned on.The power cable is not connected or theplug is not completely inserted.Connect the power cable firmly. 8The receiver has been exposed to a strongexternal electric shock (such as lightningor strong static electricity).Set the receiver to standby mode, disconnect thepower cable, plug it back in after 30 seconds andthen use it normally.—The cable is short-circuited and theprotection circuity has been activated.Make sure that all speaker wire connections on thereceiver and on all speakers are secure and that thewire for each connection does not touch anythingother than its respective connection.8The internal temperature is too high, theprotection circuity has been activated.Wait about 1 hour for the receiver to cool down andthen turn it back on.8No sound Incorrect input or output cableconnections.Connect the cables properly. If the problem persists,the cables may be defective.8No appropriate input source has beenselected.Select an appropriate input source with the INPUTselector on the front panel (or the input selectionkeys on the remote control).—Speaker connections are not secure. Secure the connections. 8The volume is turned down. Turn up the volume. —The sound is muted. Press MUTE or VOLUME +/– to resume audiooutput and then adjust the volume.7Signals the receiver cannot reproduce arebeing input from a source component,such as a CD-ROM.Play a source whose signals can be reproduced by thereceiver.—The sound suddenlygoes off.The timer has turned off the receiver. Turn on the receiver, and play the source again. —Sound is heard fromthe speaker on oneside only.Cables are not connected properly. Connect the cables properly. If the problem persists,the cables may be defective.8There is noiseinterference fromdigital or radiofrequencyequipment.The receiver is too close to the digital orhigh-frequency equipment.Move the receiver further away from suchequipment.—The sound isdistorted.The volume level is too high. Adjust the volume level. 15“CHK SP WIRE”appears on thedisplay.Speaker cables are short-circuited. Make sure speaker cables are connected correctly. 8
