A user reports that, despite manually changing the date and time on a computer, the changes always revert after the computer is turned off for a period of time. Which of the following should the technician consider first?
The CMOS battery powers the real-time clock (RTC) on the motherboard, which maintains the date and time when the computer is turned off. If the battery fails, the system will lose date and time settings, reverting to defaults on restart.
Why Not A (OS updates): While OS updates can sometimes cause time issues, they don’t typically affect changes persisting after shutdown.
Why Not C (NTP server): An incorrect NTP server setting would cause the system to synchronize incorrectly, but this issue relates to time resetting during power-off.
Why Not D (RAM): RAM is volatile memory and unrelated to storing persistent time settings.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 3.4, motherboard troubleshooting.
B. CMOS battery: This is the correct answer. The CMOS battery powers the BIOS firmware in the computer, including the clock. If the battery is failing or has died, the date and time settings will reset every time the computer is turned off.
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