Hi Olly Simmons,
Thank you for reaching Microsoft Community. We're sorry to know if your Microsoft Modern Bluetooth mouse stopped working.
Microsoft Modern Mobile Mouse are designed to work anywhere. The mouse has a shared power and Bluetooth pairing button located on the bottom. Press the button once to turn the mouse on or off. For Bluetooth pairing, press and hold the button to put the mouse in discovery mode. LED light starts to flash when mouse is in pairing mode and will stop flashing if its already paired on your device.
In your case, since the mouse no longer turns on when pressing the power button and replacing the battery also didn't work. This is more like a hardware problem on the mouse itself. Your mouse needs a replacement. We recommend contacting our live support team to check options for your Microsoft Modern mouse. You may contact them using the Surface App on your Surface Go device following the instructions below.
- Go to Contact Us - Microsoft Support and select Devices.
- Choose your preferred support method.
- Type in the problem you need help with.
- Look at any available solutions offered and select Contact Support.
Wishing you all the best!
Kind regards,
Lavenia