The control lever for the muting no longer works (the lever moves just as before). When I press on the mute button the sound is completely muted and I cannot make it only partially muted. Everything else seems to be working fine. I tried with different power chords and tried with/without concealed display. No luck. It appears that either the setting for the control lever got stuck (while the lever itself moves nicely) or I managed to press something to make it like that. Bought it in 2007.
Anybody has ideas if there is an easy fix of some sort?