If the trackball is not responsive before or after the firmware update, it is likely the mechanical issue. It is rather easy to fix or maintain over time by following EVQWJN007 Trackball Troubleshooting, Fixes and Mods
If the trackball is not responsive before or after the firmware update, it is likely the mechanical issue. It is rather easy to fix or maintain over time by following EVQWJN007 Trackball Troubleshooting, Fixes and Mods