what should a technician do before working on a computer?

Before working on a computer, a technician should focus on two big priorities: safety (for people and equipment) and protecting data.

Core steps before touching the computer

1. Power and electrical safety
   • Turn off the computer using the operating system if possible, then switch off the power supply.
   • Unplug the power cable from the wall and from the power supply to eliminate the risk of electric shock.
   • Disconnect all external devices (printers, USB drives, monitors) so nothing is accidentally damaged or pulling the system.
2. Static electricity protection
   • Put on an antistatic wrist strap and connect it to a grounded metal part, or regularly touch a grounded metal object to discharge static electricity.
   • Work on a non‑carpeted floor and avoid clothing that builds up static (like wool) to reduce the chance of electrostatic discharge harming components.
3. Workspace and environment check
   • Clear and organize the work area so there is enough space to lay out components and tools.
   • Check the surrounding area for trip hazards, loose cables, or clutter that could cause accidents.
   • Make sure drinks and food are far away from the computer and tools.
4. Data and customer protection
   • Back up important data (to an external drive or cloud) before making any significant change or repair.
   • Confirm with the user or client what data or settings are most important to preserve.
   • Label the machine or job with the customer’s details so parts and drives do not get mixed up.
5. Tools, documentation, and plan
   • Gather the correct tools (screwdrivers, antistatic strap, compressed air, flash drive with tools, etc.) so you do not have to hunt for them mid‑repair.
   • Review any available documentation: model manuals, motherboard diagrams, or previous service notes.
   • Clearly define the task: diagnosis, cleaning, upgrade, or replacement, and think through the steps before opening the case.
6. Initial external inspection
   • Look over the computer case for obvious damage, blocked vents, dust build‑up, or loose cables.
   • Listen and ask about symptoms (no power, beeps, random shutdowns, slowness) before disassembling anything.
   • Note any unusual smells (like burning) that might indicate power supply or component failure.
7. Personal safety and ergonomics
   • Wear appropriate protection if needed (e.g., safety glasses when using compressed air).
   • Arrange the computer at a comfortable height to avoid strain during long repairs.
   • Make sure the room is well‑lit so small connectors and labels can be seen clearly.

Mini checklist a technician can use

• Turn off and unplug the computer.
• Disconnect all external devices and cables.
• Put on and connect an antistatic wrist strap.
• Clear, clean, and organize the workspace.
• Check the floor and area for trip hazards or clutter.
• Back up important data or confirm that a backup exists.
• Gather tools and documentation.
• Perform a quick visual check of the outside of the computer.
• Confirm the problem description with the user.
• Only then open the case and begin work.

These habits help prevent electric shock, protect delicate components from static damage, avoid workplace accidents, and reduce the chance of data loss or misdiagnosis.