Oh man, my first TV when I was a kid... SLAP hey it's fine now, start to sit back down, starts jumping around again, sonofa... You probably jammed one of the m

Oh man, my first TV when I was a kid... SLAP hey it's fine now, start to sit back down, starts jumping around again, sonofa... You probably jammed one of the mechanical components, striking it again probably dislodged it.