Subwoofer makes noise like an untuned TV regardless of volume knob

is it a hissing?

Unfortunately the subwoofer should have a volume control knob, and the subwoofer for the DVD765 does not have this, that is why it is so loud, the only work around is to get an audio cable with a built in volume control knob.

Hello
First make sure that the "Mute" function is OFF. If it is set to "ON", no volume will be there.

Your TV has a volume lock function included [Global Volume Lock].

The remote comes preset to allow independent volume control of each selected device (Global

Volume Unlock). However, you may change the Volume Lock setting to Global Volume Lock so that

one device's volume will control volume in all other modes. After that, you can perform Individual

Volume Unlock on a selected device to set its volume control for independent operation or Global
Volume Unlock to remove all volume locking.
Locking Volume Control to One Mode (Global Volume Lock)
[1] Press and hold SET UP until the red LED blinks twice; then release.

[2] Enter 9-9-3 and then press the mode key for the device you want to control volume (for

example,TV). The LED blinks twice. Now when you press VOL+, VOL-, or Mute, the selected
device (for example, TV) will control the volume regardless of the current mode.
Unlocking All Volume Control (Restoring Global Unlock)
[1] Press and hold SET UP until the red LED blinks twice; then release.

[2] Enter 9-9-3 and then press VOL+. The LED blinks four times.
Volume is now independently controlled for all programmed devices.
Unlocking a Single Device's Volume Control
[1] Press a device key (TV, VCR/DVD, CBL/ SAT, or AUX).
[2] Press and hold SET UP until the red LED blinks twice; then release.

[3] Enter 9-9-3 and then press VOL-. The LED blinks four times. Volume is now
independently controlled for the selected devices.
OK

press and hold the select button and and when it says demo turn the volume knob until it says off then press select

Subwoofers are more susceptible to magnetic and radio frequency interference than your average speaker, or more commonly called RFI.

If you have a RadioShack or other electronics store nearby, purchase a ground loop isolator. This will ground any of the stray electrical pulses around your subwoofer. It is very easy to install and plugs directly into the RCA jack of the subwoofer and should eliminate the problem.

If this does not solve your problem, I suggest bringing your unit in for service if the noise is bothersome.

usely it turn out to be a ground issue make shure there are grounded with the PROPER guage of wire or heaver the required

I assume you are using XP. Try these steps.
1. Open 'Sound and Audio devices' in Control Panel.
2. Select 'Advanced...' button near bottom.

3. Select 5.1 system

4. Start playing a sound.
5. Set the volume control of the subwoofer to the middle position.
6. Open volume control and adjust Master volume to a comfortable level (i.e. until there is no hum).

Also make sure you haven't muted any sound device except microphone. I think your problem is you have set it to the maximum level. So decrease it.
7. Mute the sound and check.
Good luck! Let us know the result.

It turns out its most likely one of the resistors on the PCB on the amplifier plate.

My uncle has had the same problem and managed to replace the resistor and its working as normal now.

There is a problem wwith teh power supply or the amp section. Does the noise remain constant or does it vary in volume? The sub should have a level control, does the noise vary with that control?
Dan

1) First check the mute.
2) Make sure there aren’t headphones plugged in, that will disable the speakers.
3) Check the audio setup
4) Check your Volume lock


Changing Volume Lock
The remote comes preset to allow independent volume control of each selected device (Global Volume Unlock).
However, you may change the Volume Lock setting to Global Volume Lock so that one device’s volume will
control volume in all other modes. After that, you can perform Individual Volume Unlock on a selected device to
set its volume control for independent operation or Global Volume Unlock to remove all volume locking.
Locking Volume Control to One Mode (Global Volume Lock)
1. Press and hold SET until the red LED blinks twice; then release.
2. Enter 9-9-3 and then press the mode key for the device you want to control volume (for example, TV).
The LED blinks twice. Now when you press VOL+, VOL-, or Mute, the selected device (for example,
TV) will control the volume regardless of the current mode.
Unlocking All Volume Control (Restoring Global Unlock)
1. Press and hold SET until the red LED blinks twice; then release.
2. Enter 9-9-3 and then press VOL+. The LED blinks four times. Volume is now
independently controlled for all programmed devices.
Unlocking a Single Device’s Volume Control
1. Press a device key (TV, VCR/DVD, CBL/ SAT, or AUX).
2. Press and hold SET until the red LED blinks twice; then release.
3. Enter 9-9-3 and then press VOL-. The LED blinks four times. Volume is now
independently controlled for the selected