The clock on our microwave runs slowly, constantly loosing time.

We recently had a brief power outage while the electric meter was replaced (about 5 minutes). Since then the clock on our GE microwave has run slowly, continuously falling behind. We have reset the clock according to directions several times without changing its tendency to slow down. There are no instructions in the "Troubleshooting" section of the manual to help with this problem. Can you?

As far as its other functions, the oven works optimally; the timer functions seems to works properly, as well.