I didn't change anything on my laptop. I closed it, went to bed, opened it up in the morning to find that when I pressed the volume or brightness setting buttons it wouldn't show the icon in the middle of the screen. I downloaded and installed that stupid mediasmart smart menu that's so smart it won't even launch so a lot of good that did, but given that it worked last night, and suddenly it stopped working I'm guessing that it wouldn't even really require me to download anything like that since it was working just fine beforehand. dv7-6135dx Windows 7 64-bit. Brightness and volume changes but it won't show the display.