| When the speaker is disabled, after some hours of use, the device is starting to make a high pitched constant quiet sound.
Even if the device is connected over USB to the computer, it will start to uncharge and get warm at the side with the USB port.
To fix this behavior only to activate the speaker again helps.
After a while or reboot the speaker can be disabled, but this behavior will start after some hours again.
Is my device damaged or is it a SW bug?