Help! Radio won't turn on-not blown fuse

[sezgar]

I still have the manufacturer's radio in my 2009 toyota yaris. Initially the volume control stopped working but the rest of the stereo worked. But now a couple months later the stereo won't come on or light up at all.

I checked the fuses under the steering wheel on the left and none of them were blown.

Anyone know what can fix this??? Please help