Hey, I have this Kustom KBA16 16W Bass Combo bass amp, which I sometimes use for practice. It stayed at a friend's of mine, untouched for about 4-5 months. The last time I played it there, it worked just fine. The other day I took it home, it was drizzling a bit, but I had a plastic bag over it. And today, when trying out the amp, it first turned on for a brief moment and then shut off and the power button stopped working. I tried switching to different outlets, making sure the power cord is fixed tight, but nothing seemed to work. Can you guess what it could be, and more importantly, can I fix it?