CALENDAR ERROR

Cause
The RTC's time pulse is too slow or too fast. It should be no less than 57 frames (0.963s), and no more than 64 (1.081s).

Can happen if traces are cut.

Suggestions

 * Check 32768Hz crystal
 * Check traces, especially pin 11  and pins 5, 6 and 7.
 * Check and traces to
 * Try to reset Backup RAM content:
 * Either remove battery
 * Or flip all dip switches to on and then power on the board. Then turn off the board and return all dips to normal settings
 * You can use unibios to skip this error