Welcome to HBH! If you have tried to register and didn't get a verification email, please using the following link to resend the verification email.
Screen flicking
it can happen for many reasons. It can happen when another device using the same power source which in turn makes your monitor lose power. Also, it could be bad wires that you got. Make sure all your wires are clean and are in good conidition. If both of those dont apply, get new moniter and or computer