220-802 · Question #713
A computer's time settings reset every time it is unplugged. This is a symptom of a faulty:
The correct answer is D. CMOS battery. The CMOS battery (typically a CR2032 coin cell on the motherboard) provides continuous low-level power to the BIOS/UEFI chip to retain settings - including the system clock, date, and hardware configuration - when the computer is completely unplugged. When this battery fails or…
Question
A computer's time settings reset every time it is unplugged. This is a symptom of a faulty:
Options
- AMemory module.
- BPower supply.
- CMotherboard.
- DCMOS battery.
How the community answered
(45 responses)- A2% (1)
- B2% (1)
- C7% (3)
- D89% (40)
Explanation
The CMOS battery (typically a CR2032 coin cell on the motherboard) provides continuous low-level power to the BIOS/UEFI chip to retain settings - including the system clock, date, and hardware configuration - when the computer is completely unplugged. When this battery fails or dies, the BIOS loses power and resets all stored settings to defaults every time main power is removed. A faulty memory module would cause POST failures or instability, a bad power supply would affect system operation while running, and a faulty motherboard is possible but far less likely than a dead CMOS battery for this specific symptom.
Topics
Community Discussion
No community discussion yet for this question.