A computer turns on and a "Date and Time Not Set" message appears on the screen after the manufacturer logo. Which of the following is the MOST possible cause?

The correct answer is B. The CMOS battery needs to be replaced. The CMOS (Complementary Metal-Oxide Semiconductor) battery is a small coin-cell battery (typically CR2032) on the motherboard that maintains BIOS settings - including date, time, and hardware configuration - when the system is powered off. When this battery dies or weakens, the…

Hardware and network troubleshooting

Question

Options

AThe computer was not shut down properly.
BThe CMOS battery needs to be replaced.
CThe OS has stopped synching with the NTP server.
DThe system BIOS is corrupted.

How the community answered

(57 responses)

A
2% (1)
B
89% (51)
C
4% (2)
D
5% (3)

Explanation

The CMOS (Complementary Metal-Oxide Semiconductor) battery is a small coin-cell battery (typically CR2032) on the motherboard that maintains BIOS settings - including date, time, and hardware configuration - when the system is powered off. When this battery dies or weakens, the system loses its stored settings and resets the clock on every power cycle, causing the 'Date and Time Not Set' message at boot. Improper shutdown would not cause persistent time loss. NTP sync issues occur within the OS, not before it loads. A corrupted BIOS would cause more severe boot failures.

Topics

#CMOS battery#BIOS#system clock#hardware failure

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