12:00 AM keeps flickering after battery drained and replaced

12:00 AM keeps flickering after battery drained and replaced
My alarm was showing low battery and it went dead for a couple of days. After I have replaced the batteries (tried many of them) it came back to life (radio works fine) but neither the clock or the alarm work. Whenever I plug it into the wall it starts flickering 12:00 AM and doesn't give me the options to set the time. Can anyone please help?

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