Sushumna

I got in my car tonight and tried to start it, the dash lights up as usual, but when I push the start button, all the lights in the car flicker rapidly accompanied by rapid clicking and nothing else. Then when I press the brake pedal the dash board goes out. Anyone got any ideas on where to begin to ok for this electrical fault? The battery seems to be ok. as all the electrics work correctly, stereo, lights etc, just the Start up that is haywire! Any advice greatly received. Thanks. Jules

R3DS2K

dead battery, please tell me how u know the battery seems ok?