AVR 510 memory loss and s-video problems

Troubleshooting Guide

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 520's entire system memory
including tuner presets, output level settings delay times and speaker configuration data,
first put the unit in Standby by pressing the
System Power Control button 2. Next,
press and hold the Tone Mode 8 and the
FM Mode Selector ^ buttons for three
seconds.
The unit will turn on automatically and display
the RESET message in the Main
Information Display Y. Note that once you
have cleared the memory in this manner, it is
necessary to reestablish all system configuration
settings and tuner presets.


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See link for users manual. Instructions for Processor Reset are on page 50.

"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 630's entire system memory including
tuner presets, output level settings, delay times and
speaker configuration data, first put the unit in Standby
by pressing the Standby/On Switch1. Next, press
and hold the Surround Mode Group Selector2
and the Tuning Mode Selector8buttons for three
seconds.
The unit will turn on automatically and display the
RESET message in the Upper Display Line #.
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."

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=0CCwQFjAE&url=http%3A%2F%2Fwww.harmankardon.com%2Fimages%2Fmedia%2FAVR630_OM_EN.pdf&ei=HjALVeKILsyrNtyXg6gF&usg=AFQjCNG_sg9tBR5xnCJ4wxQ5ilVYI3RSfQ&sig2=kPcGUIhiWGqVexx8yZMpzQ&bvm=bv.88528373,d.eXY

these can be related as the main battery on the motherboard is need to retain cmos setting when a system is unplugged from a/c power for extended periods of time.
so the loss of cmos would prompt you about certain components including amount of memory(pending no changes in memory amount/ slot location as a single chip unit must have the mem in slot 1). there is a round 3.0 volt battery that once reports bad, should be replaced. start there and see if you get any other errors. as there could be a problem with the powersupply or motherboard if that doesn't resolve it.

swap your red and yellow wire that supply your cd player chop and swap as one is memory the other is ignition to simply swap the red and yellow wire will solve your problem "BILLINGHAM AUTO ELECTRICS" !!!!!!!!!!

The power supply has to be on to some extent or it wouldn't light up.

http://www.retrevo.com/support/Harman-Kardon-AVR-335-Receivers-manual/id/386bh133/t/2/

Does it tune FM? That would indicate some life.

No sound? Is it Muted or a tape Monitor selected inadvertently?

Page 53: Reset the processor...

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 335's entire system memory including tuner presets, output level settings, delay times and

speaker configuration data, press and hold the Tone Mode Button (5) buttons 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 and digital input assignments, as well as the tuner presets. 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.

You have a memory cap ,usally located on the front display,that is most likely defective.measure voltage on cap with unit off should measure at least 3-5 volts

Hi there.
Have you tried to connect the left speaker on the right wire.
If that's ok check the balance setting on the unit or volume on each speaker.
Iceman.

i think you have a main board problem and also moiture may have got to it .
electronics are not what they use to be and these days you really have to place them in the right spot or it wont last .
the main volume dial may require cleaning .

This is what's in the AVR7000 service manual:

Subject: Backup Memory on AVR/DPR/HK series receivers.
In the event of the complaint: “the receiver is losing its memory (any programmed system settings)
when the unit is turned off, or after the unit is unplugged (briefly*)”:

Check and replace:
Model: AVR7000
Designator: C730
Location: Front PCB
Description: 0.047 Farad 5.5v capacitor
Part number: # P10790-ND or # J3432147324X

I'm having the same problem and this is how far i got so far. I don't kwow how to get and replace this part.

Are there any MUTE or Tape Monitor buttons pushed in?