Other problems – Casio HK1223 User Manual
Page 140
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8-14 Troubleshooting
If you are using the battery power, make sure that the battery is not
discharged.
When you turn on the computer, it stops after POST.
Restart your computer.
Other Problems
The date/time is incorrect.
Correct the date and time via the operating system or SCU program.
After you have performed everything as described above and still
have the incorrect date and time every time you turn on the computer,
the RTC (Real-Time Clock) battery is at the end of its life. Call an
authorized dealer to replace the RTC battery.
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