Question about Bose (321GS) System

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Hello Fousea,
Guru Techman is right. It could be the thermal cutoff inside the transformer. If your 321 however is the latest version, they have a habbit of blowing the fuse and MOV on a PCB inside the sub box.
if you got lucky, its all you have to replace. Power of your head unit comes from the sub box through a square connector esp type cable.

Hope This Will Help. Good Luck

Posted on Dec 28, 2007

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If the unit is totally dead then there is probably a blown power transformer or the thermal cutoff inside the transformer. Make sure you check the obvious before sending the unit in for service by checking where its plugged into, unplugging overnight to see if the unit resets. There are no user serviceable parts inside this unit as its all solid state and all parts are soldered in. Sorry I couldnt assist you more!! Good Luck

Posted on Jun 24, 2006

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1 Answer

System Display shows bose3-2-1

I assume your display shows Bose 321 and refuses all commands?
Your problem is not very well described. Often when something like this happens you may be able to "reset" the system by removing the AC cord from the power and after a count of 10 putting it back in. Normally the display will start with showing the Bose 123 text on the display and will subsequently go dark. After that you can switch the unit on and it should work. If it does not, call Bose, sometimes just updating the software solves this type of problem. Ask for an update disk. Normally they send that free of charge to your registered home address.

Feb 14, 2014 | Bose 3 2 1 GSX System

1 Answer

Bose 321 sound fading

Try the following:

1) Switch the unit off completely, using the powerswitch on the back of the bass box.
2) Switch the unit back on via de switch on the bass box.
3) The display should read BOSE 321 and than be dark.
4) Insert a CD and switch the unit on with the remote by selecting the CD/DVD mode.
5) When the sound is now OK, it means that you need to contact Bose to ask them for the latest software update for your unit. After updating your system. The problem will not reoccur.
6) in case the problem continues and at start-up using a CD, no improvement of sound is heard, the system should go into repair. Contact Bose in your country and ask for return instructions.

Jan 13, 2014 | Bose Home Theater Systems

1 Answer

Have a Bose 3-2-1 Series III. When I put in a DVD, I get sound through the Bose but no picture on my Pioneer TV. This is the second time it has happened. The first time it, we managed to get it going...

Here are 3 things to try and an if all else fails at the end.

1) Make sure the TV is set to the correct Video Input to see the video from DVDs on the Bose system.
• Make sure a DVD is in the disc tray.
• If the TV is connected to the media center using the HDMI cable:
Switch from one Video Input to another and then back to the original input.

2) Turn everything off, then:
Turn on the TV and set the TV Video Input for the Bose system video.
Turn on the Bose system and press DVD.

3) Turn off both the TV and the Bose system and then:
Unplug the HDMI cable from both ends.
Disconnect the power cables from both your TV and the Bose 321 system.
Re-connect power to the TV and to the Bose 321 system.
When the Bose 321 system startup message disappears from the display,
re-connect the HDMI cable to the TV then Bose 321 system.
Turn on the TV first, then turn on the Bose 321 system.

If all the above fail then disconnect the HDMI cable that connects the TV to the Bose 321 system and reconnect the two using a Component cable, an S-Video cable, or the Composite cable provided with the system.

Please leave feedback



Apr 28, 2011 | Bose 3·2·1 II System

2 Answers

There is a cd stuck in the system how do i get it out

This solution is from the troubleshooting section of the manual:

• Follow these steps:
1. Turn off the unit.
2. Unplug the Acoustimass module power cord from the outlet for 60 seconds, then reconnect it. This
allows the unit to reset itself.
3. Before powering on, press and hold Eject on the media center.

Hope this info may help you!

Mar 10, 2011 | Bose 3·2·1 II System

1 Answer

Bose 321 system stuck at 30 volume

Is vol buttons button on unit do the same, try remote.
If not try unplug from wall wait hour and try agian, if not bose update cd..

Aug 02, 2009 | Bose (321GS) System

1 Answer

Bose 321 Power Problem

try to check your ac cord may there's a loose contact between transforner outlet and ac cord of your system

Jul 11, 2009 | Bose (321GS) System

1 Answer

Bose 321 tray will not open

If it's flashing on and off, then the DVD drive is the least of your problems. Check to see if there is a dual-voltage switch on the bass module. (if so, set it to 120v if you're in the US) As for the DVD drive--> Try another reset by unplugging the power for at least 30 seconds. Plug it back in, "Bose 321" will appear and disappear from the display, and then press the eject button before you power it back on. Wait about 3-8 seconds. If the drive won't open, it will probably need a repair. $150 for repair w/ new warranty through Bose- 800-367-4998.

Jun 21, 2009 | Bose (321GS) System

2 Answers

Communicating with your tv message on bose 321 series 2

Well, it seems that this may be a common issue with this BOSE unit. My 321 GSIII was working fine as well for about a week. After a full frustrating day of switching, disconnecting, reconnecting cables and resetting the unit and TV several times, I was forced to call the BOSE Technical. They tried to help with the situation over the phone by directing me to do just about everything I did before I ever called them. After about an hour of their unsuccessful help, they left me in saying that I will now have to run Composite cables because my TV will not connect for some reason through HDMI even though it was working for a short time. AHHHHH...I custom prepared the walls in my new office to accommodate non-exposed cables and wires and now BOSE is saying to expose Composite cables. Tomorrow, I am going to connect the Composite cables to confirm if the 321 will now work that way (for curiousty). I will then call BOSE back and demand a replacement unit. I will keep all in the loop with my progress of this situation.

Apr 01, 2009 | Bose 3·2·1 II System

1 Answer

Bose 321

I have same issue. This happened on 12/31/2007 after 13 months of operation. Though remote is not controlling the unit, it controls TV. I went to BOSE showroom (Chennai, India) and remote worked perfectly with their GS display unit. Then I went to service center. Serviceman promised me to send a CD with software upgrade. Let me wait for a day or 2 receive CD and test it. Have you got any solution.

Dec 28, 2007 | Bose (321GS) System

3 Answers

Bose 321 DVD System

I love my Bose 321 DVD system, but a few days ago, it started acting weird. I put in a DVD, and it reads - "No Disc".....and I'm not sure why. I cleaned the disc, and I also played a DVD/CD Maintenance kit - I'm not sure what is wrong. It seems like I have a problem within the system - what can I do?

Dec 10, 2007 | Bose (321GS) System

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