here's something wrong with my amp

I've been using a DRIVE CD 3008, for a while, and it's not the best, but it works well. There's a weird problem, though. The volume isn't working right; I haven't changed the settings on anything, but it barely gets loud at all anymore like it used to. And now for some reason my overdrive pedal isn't working right and producing the distortion anymore. Are these related issues? I've tried different 1/4 inch cables, plugging my bass in directly to the amp, tried just the overdrive, and tried different pedals (they work fine). and the volume also works right when the pedals are on. this problem started today, it was working fine yesterday.