What is this sound from my blaster???

the only problem with sealing that is that it is meant to drain if anything gets in there through the wire inlet on the top. there is a spot on the bottom that is suppose to be open. i sealed mine once until i saw steam shooting out of the wire inlet..... steam.... electricity.... bad....

that is the noise i remember noob. it sounds the same to me just amplified. I would guess it is that gear. not cheap though, like 65-75 bucks on bikebandit. I need to replace mine and don't want to drop the dough. but i probably will anyway.