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CompTIA

220-801 · Question #818

A technician arrives in Germany and discovers that when their PC is plugged into the outlet, no power is received. Which of the following actions should the technician take to get the PC to operate?

The correct answer is B. Adjust the voltage selector switch. Germany (and most of Europe) uses 220–240V AC power, while the United States uses 110–120V AC. Many PC power supplies include a physical voltage selector switch on the back of the unit, typically allowing selection between 115V and 230V. If this switch is set to 115V and the PC…

Hardware

Question

A technician arrives in Germany and discovers that when their PC is plugged into the outlet, no power is received. Which of the following actions should the technician take to get the PC to operate?

Options

  • AChange the BIOS settings to the local time
  • BAdjust the voltage selector switch
  • CAttach a 220 volt power strip from the current region to the PC
  • DAttach a 120 volt battery backup power supply to the PC

How the community answered

(32 responses)
  • A
    6% (2)
  • B
    91% (29)
  • D
    3% (1)

Explanation

Germany (and most of Europe) uses 220–240V AC power, while the United States uses 110–120V AC. Many PC power supplies include a physical voltage selector switch on the back of the unit, typically allowing selection between 115V and 230V. If this switch is set to 115V and the PC is plugged into a 220–240V outlet, it will not function (or may be damaged). The correct action is to adjust the voltage selector switch to the appropriate local voltage (230V). Attaching a 220V power strip does not solve the voltage mismatch, and a 120V UPS would provide the wrong voltage. BIOS settings have no effect on power supply voltage.

Topics

#voltage selector#power supply#international power#PSU

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