10-09-2015 03:48 PM
After I install all recent upgrades from Lenovo System Update, the volume control (F1, F2, F3) stopped working on my Lenovo thinkpad T450s. When I test it on keyboard tester, it showed that F1,F2,F3 does work, but the volume never worked. I tried to press the keys with the function key and without the function key, neither way worked. What should I do to fix it? Any help will be appreciated! Thank you!