We just got another "is this equipment safe to use" question (https://cooking.stackexchange.com/questions/115859/burn-mark-inside-microwave-still-safe-to-use) . Since we are not qualified to answer such questions, can we please make "Equipment/electrical safety" off-topic?
Suggested text for the off-topic item in the help center at https://cooking.stackexchange.com/help/on-topic:
"Equipment or electrical safety (e.g. "Is this microwave still safe to use"): instead, please have a qualified professional inspect the appliance."