I recently bought the M6900 mouse and it appears to be broken, i am just curious if there is anyway to fix this. The dpi changer buttons are not working and the led for them is not lighting up, the 2 buttons on the side are also not working as well as the left and right tilt wheel. I have downloaded the driver and the firmware update from the gigabyte website and the mouse is still not working. Is there anything that can be done to fix this or is it simply just a bad mouse?