Reference; Troubleshooting - NAD M15 HD Owner's Manual

CONDITION
No sound from all channels.
No sound from some channels.
No sound from surround channels.
No sound from Subwoofer.
No sound from Center channel.
No Dolby Digital/DTS.
M15 HD does not respond to HTRM remote.
M15 HD does not respond to front panel
commands or remote control.
Factory defaults for 120V version only : Press simultaneously Source
Factory defaults for 230V version only : Press simultaneously Source
POSSIBLE CAUSES
• AC power unplugged.
• Power not switched on.
• Outlet has no power.
• Faulty/missing cables.
• 'Speaker Configuration' channel (s) set to
"OFF".
• Power-amp connections faulty.
• No surround listening mode is engaged.
• Surround-channels set to "OFF" on 'Speaker
Configuration' menu.
• Surround-channels level set too low on
'Speaker Levels' menu.
• Subwoofer is off, not powered or improperly
connected.
• Subwoofer set to "OFF" on 'Speaker
Configuration' menu.
• Sub level set too low on 'Speaker Levels'
menu.
• Source is a 2/0 (etc.). Dolby Digital or DTS
recording without center channel.
• Center set to "OFF" on 'Speaker Configuration'
menu.
• Center level set too low on 'Speaker Levels'
menu.
• Source's digital output is not connected to a
M15 HD digital input.
• Source component not configured for
multichannel digital output.
• Batteries are flat or incorrectly inserted.
• IR transmitter window on remote or IR A/V
Receiver window on M15 HD is obstructed.
• M15 HD front panel is in very bright sunlight
or ambient light.
• Microprocessor error.
• M15 HD may have over heated.
• 12V TRIGGER IN/OUT is set to AUTO position.
+ Tone Defeat
+ Tone Defeat

REFERENCE

TROUBLESHOOTING

POSSIBLE SOLUTIONS
• Check AC cable connection and outlet.
• Check cables.
• Check 'Speaker Configuration' menu.
• Check power amplifier and cabling.
• Select appropriate listening mode.
• Correct 'Speaker Configuration' or 'Speaker
Levels' settings.
• Power-up subwoofer, check Sub's AC outlet
or check connections.
• Correct 'Speaker Configuration' or 'Speaker
Levels' settings.
• Play a known 5.1-channel recording or select
Dolby Pro Logic IIx Music mode.
• Correct 'Speaker Configuration' or 'Speaker
Levels' settings.
• Check connections.
• Check source component setup.
• Check batteries.
• Check IR windows and ensure clear line-of-sight
from remote to M15 HD.
• Reduce sunlight/room lighting.
• Power-down the M15 HD via the rear panel
Power switch and unplug it from the AC outlet.
• Wait five minutes, re-connect and power up.
• Switch 12V TRIGGER IN/OUT to OFF position.
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