Hello friends,
I had the identical error with my BOSE SoundLink Mini.
After a time out for about 2 years in a drawer, the device did not come around.
I also invested in a new battery. You can save that. It will not work !
In my opinion, the problem is due to the firmware, as I tried some tests with the original battery and the repurchased battery.
I did not find any way to reactive the device from USB side to flash the Firmware or get a life-signal.
Unfortunately, there is no firmware support from the manufacturer.
Therefore, I do not believe in a solution to our problem ...
Since I really appreciate the size format of the device when camping, I took a pragmatic approach.
Some of you may curse me for this ;-) !
I removed all boards from the device and installed another mainboard from our chinese friends. (Google: xh-a153)
I converted the USB port from the original board to a charging port.
The holder of the 18650 cell I worked on with the DREMEL so that it can now even be easily exchanged. (In case of a two year timeout again...).
The China board is with about 5 watts a little weak on the chest, but from the sound for background music at the barbecue perfectly fine.
It also fits well, as we say in good old Germany, like "wie d´ Faust auf´s Aug!". It sits so tight that nothing rattles or affects the sound.
Many greetings and have fun tinkering.
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