SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aplus-disconnect-power

What should you do before opening a PC to repair it?

Disconnect power first.

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  1. Leave it plugged in with the switch on
  2. Wear a metal bracelet and stay plugged in
  3. Disconnect power ✔

Why: CompTIA lists disconnecting power before repairing a PC as a personal safety step. It lowers the chance of electric shock and damage to components.

Huh, didn't know that: The same objective lists ESD straps, ESD mats and antistatic bags as ways to prevent electrostatic discharge.

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Hardware: the parts of a computer you can kick. Software: the parts you can only curse at.
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References

Answer: Disconnect power. CompTIA lists disconnecting power before repairing a PC as a personal safety step. It lowers the chance of electric shock and damage to components.

  1. CompTIA A+ Core 2 (220-1202) Exam Objectives v1.1 lecbyo.files.cmp.optimizely.com/download/84764f7a85ba11ef87e9da1cab964337
    Disconnect power before repairing PC
    Checked 2026-10-10.

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