Have Acoustimass 15 system. Subwoofer stopped working and I don't think the fuse is blown. Anyway it does not look blown.

Yes, the Bose Acoustimass 15 Series 3 system does have an internal fuse that can be a potential cause for the lack of power and sound. If the system is not receiving power or showing any LED indicator lights, it's worth checking the fuse as a first step in troubleshooting.
To access the fuse in the Acoustimass module, follow these steps:

1. Ensure the system is unplugged: Before working on any electrical components, make sure the Acoustimass module is completely disconnected from the power source.
2. Locate the fuse compartment: The fuse compartment is typically located on the back or bottom of the Acoustimass module. It may be covered by a removable panel or secured with screws.
3. Open the fuse compartment: Remove the panel or screws to access the fuse compartment. Inside, you should see the fuse holder.
4. Check the fuse: Inspect the fuse visually to see if it is blown or damaged. If the fuse appears blackened, broken, or melted, it is likely blown and needs to be replaced.
5. Replace the fuse: If the fuse is blown, replace it with a new one of the same type and rating. Ensure you use a fuse with the correct amperage specified by the manufacturer. It's a good practice to keep spare fuses of the appropriate rating on hand for future needs.
6. Close the fuse compartment: After replacing the fuse, securely close the fuse compartment and ensure it is properly sealed.
7. Plug in the system: Reconnect the Acoustimass module to the power source and turn it on. Check if the LED indicator lights up and if sound is produced.

Was the fuse for the sub blown?

maybe or its to close or far away id check for the fuse

Hi, ok the Bose Acoustimass III system consists of two small cube speakers and one subwoofer unit called the Acoustimass bass module. If the subwoofer stops working, three points can be the cause of the failure. The Bose Acoustimass III is a passive system, meaning the speakers do not power themselves, but instead are connected to a receiver or amplifier. Thus, the amplifier, the speaker between the amplifier and the subwoofer, or the subwoofer itself could be the issue.

Things You'll Need:

* Amplifier
* Speaker cable
* Extra subwoofer


Instructions


Disconnect the speaker cable from the back of the Bose Accoustimass bass module and connect it to a subwoofer that is known to be working. If the subwoofer works, the bass module needs to be replaced.


Disconnect the speaker cable from the back of the receiver or amplifier you are using and from the back of the subwoofer in Step 1.


Connect a speaker cable that is known to be working between the back of the receiver or amplifier and the back of the Accoustimass module. If the module starts working, then the cable was the issue.


Disconnect the speaker cable from Step 3 from the back of the amplifier or receiver, then connect the cable to the subwoofer port on the back of an amplifier or receiver that is known to be working. If the subwoofer works, the receiver was the issue. If the subwoofer still does not work, verify that the speaker cable is in the subwoofer port of the receiver/amplifier and that the cable is connected securely to the subwoofer.



If you think you did the connection properly,Fine... If not you can use the manual from the below link and know how to connect it properly..

products.bose.com/pdf/customer_service/owners/og_am5iii.pdf


Have a nice day..

hi,
can be chance for fuse blowing. also check is there is any MOV ( used for over voltage surge protection) chance to become shorted. if MOV is there, insert fuse only after replacing MOV.
ok

Fuse is probably blown

Clarify, did it ever work for you? Were both receivers used properly configured for the subwoofer? Did you also test the other speaker moduels running off the subwooferto see if they work?

Speaker Receiver setting
• Left and right LARGE
• Center LARGE
• Left and right surround LARGE
• Center surround* LARGE
• LFE/Subwoofer ON
With an Acoustimass 16 Series II system or upgraded Acoustimass 15 Series IlI system only.

I will try as best I can... There is no light on the unit. There is a two position switch, that's your on/off switch located on the botttom of the unit next to the pwr cord input... When the straight lined side is pushed down the unit is energized. When you pwr up the unit you should hear a light bump, not a cracking noise. There is a fuse on the main input/output board that is pretty easy to pop and swap.

Sounds like an inadequate ground wire in the signal cable. You may have to replace the cable between the reciever and bass module. It also, however, may be IN the bass or reciever module.