360 Spider clock repair?

I have a 2004 360 Spider. The digital-style clock is mounted above the rear view mirror. Mine does not keep accurate time, and switches between keeping time is 12 hour and 24 hour increments. Also, I believe that the clock is supposed to be illuminated, as it is almost impossible to see numbers in daylight and absolutely impossible at night. Mine has no light. Does anyone know what is involved in a repair? Is it a DIY-type repair? I would describe my mechanical skills as somewhat klutzy, but I am willing to try, especially when given good instructions. Thanks for any help.

 

No, I didn't know about your DIY bit. It did not show on the search I did. Maybe a different keyword would have done the trick. Anyway, I am not sure I want to try to do what you did, for fear of damaging the clock. Also changing from 24 to 12 is the last of my 3 problems with the clock. The first two are: the clock is not illuminated. Is it supposed to be lit up all the time, only when the outside lights are on, or something else; and the clock does not keep accurate time. It stops and goes. If it would be illuminated so that I could read it, and if it would keep accurate time, I might be willing to put up with the 24 hour feature. Help!