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TROUBLESHOOTING GUIDE
SYMPTOM CAUSE SOLUTION
Unit does not function when Main • No AC Power • Make certain AC power cord is plugged into a live outlet
Power Switch is turned on • Check whether outlet is switch-controlled
Display lights, but no sound • Intermittent input connections • Secure all input and speaker connections
or picture • Mute is on • Press Mute Button
• Volume control is down • Turn up volume control
No sound from any speaker; • Amplifier is in protection mode • Check speaker wires for shorts at receiver and speaker ends
PROTECT message appears on due to possible short
front panel • Amplifier is in protection mode • Contact your local Harman Kardon service center
due to internal problems
No sound from surround or • Incorrect surround mode • Select a mode other than Stereo
center speakers • Input is monaural • There is no surround information from mono sources
• Incorrect configuration • Check speaker configuration
• Stereo or Mono program material • The surround decoder may not create center- or rear-channel
information from nonencoded programs
Unit does not respond to • Weak batteries in remote • Change remote batteries
remote commands • Wrong device selected • Press the AVR Settings Button
• Remote sensor is obscured • Make certain front-panel sensor is in line of sight of remote
or connect an optional remote sensor
Intermittent buzzing in tuner • Local interference • Move unit or antenna away from computers, fluorescent
lights, motors or other electrical appliances
Surround Back Speaker settings • Multizone system has been turned • Use the menu system to access the Zone 2 menu and reassign
cannot be accessed, and test tone on, and the surround back channels the surround back channels to the main room
does not play through Surround were reassigned to multizone
Back Speakers operation
The XM Preview Channel (001) • XM antenna is not plugged in • Use an XM antenna module designed for use with XM Ready home
is silent audio equipment, and plug the module into the XM Radio Jack
• XM antenna is not located in such • The XM antenna module needs an unobstructed view of the
a way as to enable reception southern sky, or to be within range of an XM terrestrial repeater;
if necessary, purchase an extension cable from your XM Radio dealer
• XM signal requires a refresh • Visit www.xmradio.com
Unable to activate Program mode • AVR Settings Button not held for at • Follow the instructions in the remote’s LCD Display
on remote least 3 seconds
Remote buttons light, but AVR does • Remote is in Zone 2 mode • Slide the Zone Switch at the bottom of the remote to the
not respond Zone 1 position
Unable to play Internet Radio • AVR is not able to access the Internet • Make sure the Network Jack is connected to an active router;
navigate to the Network Settings submenu in the System Setup
menu and change the Network Settings line to “Manual”; contact
your ISP to obtain the correct information for the other settings in
this submenu
Unable to access content on PC • Content not in proper format • Only content in the form of MP3, WMA and JPEG files may be shared
from Network source with the AVR
• Content has not been shared by • Network device must be running compatible software; network device
network device must be programmed to share the content over the network; refer to
the Network Playback section on page 37 for details
Additional information on troubleshooting possible problems with your AVR 7550HD, or installation-related issues, may be found in the list of “Frequently
Asked Questions”, which is located in the Product Support section at www.harmankardon.com.
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