Product Info

87
Turn off power management.
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Other Problems
The date/time is incorrect.
Correct the date and time via the operating system or BIOS Setup
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.