mga sir, what could be wrong if this is not normal?

every morning, after starting up the engine, pag-ON ko ng radio, there's always this annoying Whirring sound. Walang palyang ganito lagi. So naging practice ko na play ko muna CD for a minute or two and pagbalik ko sa radio wala na yung whirrs!

(pag umaga, AM radio ako for the news...)
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