My G903 mouse is not detected

As the title says, my G903 mouse is not detected by the computer. It worked perfectly fine, until the cursor suddenly moved at the top of my screen and I couldn't move it. I turned my mouse off and on again, and it didn't connect. I checked G Hub, it told me to try the pairing tool, and it says that "Connection has been timed out". The mouse doesn't show up at all in device manager, not even if I use the USB cable to connect it. I've been using this mouse for around 3 years and it had no problems until now.