From what you have posted, it does sound like your bass module is having some power issues considering that you have tried troubleshooting already.
I would recommend that you contact your local support team to discuss all service options to get your bass module repaired.
You can access the contact details here. Select your region and scroll down to the bottom of the page and select "contact us"
you will then find all the details needed to call in to the technical support team.
I hope this helps!
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