Axiom Home Page Forums General Discussion Home Theater help! weirdness with my receiver

Ah ha!

From the HK manual :

Processor Reset
In the rare case where the unit’s operation or the displays
seem abnormal, the cause may involve the erratic
operation of the system’s memory or microprocessor.
To correct this problem, first unplug the unit from the
AC wall outlet and wait at least three minutes. After the
pause, reconnect the AC power cord and check the
unit’s operation. If the system still malfunctions, a system
reset may clear the problem.

To clear the AVR 230’s entire system memory including
tuner presets, output level settings, delay times and
speaker configuration data, press and hold the Tone
Mode Button5button for three seconds. The unit
will turn on automatically.

NOTE: Resetting the processor will erase any configuration
settings you have made for speakers, output
levels, surround modes, digital input assignments as
well as the tuner presets. After a reset the unit will be
returned to the factory presets, and all settings for
these items must be reentered.
If the system is still operating incorrectly, there may
have been an electronic discharge or severe AC line
interference that has corrupted the memory or
microprocessor.
If these steps do not solve the problem, consult an
authorized Harman Kardon service center.