Windows 10: Lenovo E590's Keyboard mute button won't work, but the light turns on.

Hi, I have a Lenovo e590 and I'm having mic issues. When I press the button f4, the button lights up, but I can still be heard when I'm supposed to be muted. The other day, I had the issue that it wouldn't work at all and the light wouldn't turn on, but I fixed that by uninstalling the keyboard drive and then reinstallingWhat can I do about this? I've already tried uninstalling the driver and checking for updates.

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Volume Mute Light won´t change color

Before I follow your suggestions, a quick update: as the updating didn´t seem to work I stopped trying and just left it alone for awhile. About a half hour later I looked over and saw that the mute light was now blue. I tried the button but it and the volume buttons did not work at all. On the screen I was told that I needed to reboot, which I did and now the system has returned back to the way it was before: everything works except that the mute light does not change to blue as it should when the speakers are not muted. WTF?

 

Volume Mute Light won´t change color

Ran the tests and all came up o.k.. Looked for but couldn´t find any function test for the lights above the keyboard. During the whole test sequence the mute light was green-blue, like the volume up and down lights but when I then rebooted the light went orange again and stayed so even though pressing it allowed the mute function to turn on and off, so now what?

 

Volume Mute Light won´t change color

I have an HP ProBook 6440b with a Win 10 Pro os. My problem is the volume mute light (#5 in the service manual, page 2-6). The switch works o.k. and shows when the mute function is on or off on the desktop but the light stays orange (muted position) regardless of the function being on or off. I know that the blue color is there as I see it flicker so slightly during upbooting but I can´t find out how to have the blue color show when the speakers are not muted. The wireless button (#4; page 2-6) changes color and the function works properly when pushed (tried it as a function comparison test) so I think this may be a slight software glitch in the sound system code but how to find and fix is way beyond my knowledge and skills. If anyone knows how to fix this problem, please do tell but baby steps please as my computer skills are truly limited (old dog, new trick syndrome rules here).