m-tec bmw 325 ci spo
ive got an acer computer with flat screen monitor and buiit in speaks to it it was working fine the other week i used to turn the volume up by pressing the up and down keys on the screen but now its like its been locked i push thebuttons and nothign happends i cant get any sound on even the power button on the monitor wont turn on or off it just come son with the comp and when u go into the volume mixer it has then volume bit but has a black box around it ? help please
