BDS 580S (serv.man2) - Harman Kardon Audio Service Manual (repair manual). Page 10

Troubleshooting

21

BDS 280S/580S

The system does not power up (the Power indicator is not lit)

• 

Check whether the system’s Power cord is properly plugged into the 
system’s AC Power connector.

• 

Check that the Power cord is plugged into a working AC outlet. If the 
outlet is controlled by a switch, make sure the switch is set in the ON 
position.

• 

Check that the system’s main power switch (located on the rear panel) 
is in ON position.

Sound plays through the speakers, but there is no TV picture

• 

Check the HDMI connection between the system and the TV.

• 

Check the HDMI connection or Component Video connection between 
the source device and the BDS system.

• 

Check that the TV is turned on and is set to the proper input source.

• 

Unplug the HDMI cable from the TV and plug it back in again.

There is no sound coming from just the subwoofer

• 

Check that the subwoofer’s Power cord is plugged into a working AC 
outlet.

• 

Check that the subwoofer’s power switch is in the ON position.

• 

Check that the Subwoofer Level control is not turned all the way down 
(fully counter clockwise).

• 

Check that the audio connection between the system and the subwoofer 
has been properly made.

• 

Check the system’s Settings: Configuration menu to make sure that the 
subwoofer volume has not been set at 10dB.

There is a constant hum in the sound

• 

Check that all input cables are plugged all the way into their connectors.

• 

Check that all cables are at least 10 ft (3.3m) from fluorescent lights.

• 

Check that all cable connectors are clean. If necessary, wipe them with a 
cloth slightly moistened with alcohol.

• 

Set the subwoofer’s power switch to OFF. If the hum goes away, there 
is a ground loop between the subwoofer and the system. Plugging 
the subwoofer’s power cord into the same AC outlet that the system is 
plugged into should eliminate the ground loop.