Question: are all sylvania electrical panels bad?
Answer: Why they're unsafe: The circuit breakers inside many Zinsco panels melt to the main 'bus bar'. ... Also, many GTE-Sylvania or Sylvania panels are simply re-branded Zinsco panels or contain the problem Zinsco design. These should also be replaced. However, not all Sylvania and GTE-Slyvania branded panels are dangerous.