Flashing numbers in squares

Question

I have had my Accu Breck for over 3 years without any problems. Just the last 4 days the number in the squares started to flash. Also when the right bottom button is pressed after the chrono count is stopped, only the second hand (the long one) resets itself to 12 o'clock position, but not the minute or the hour hands. Can you help, does it need a new battery?