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You get a CMOS checksum error during bootup. What is most likely the cause?

  • A.power supply is bad
  • B.BIOS needs updating
  • C.CMOS battery is nearing end of life
  • D.hard drive types are incorrectly defined

Answer: C

Correct answer: CMOS battery is nearing end of life

The checksum is stored with the CMOS settings and fails when they are corrupted, which happens as the battery loses the charge that maintains them. A new battery and re-entered settings cure it.

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