From Engadget · Gabriela Vătu · · 1m 40s
Unplug your PC during power outages
A powered-off computer still risks damage from voltage spikes when the grid comes back online.
In brief
A powered-off computer still risks damage from voltage spikes when the grid comes back online. Unplugging your PC from the wall during a power outage is the simplest and most effective way to protect it from voltage surges. Originally reported by Engadget.
Shutting down isn't enough
A powered-off PC still connects to your home's electrical wiring, leaving delicate components like the motherboard and SSD vulnerable to voltage spikes when power returns.
Voltage spikes cause real damage
US household circuits run at 120 volts. Even moderate spikes above that level can permanently damage sensitive computer components, especially when the grid comes back online.
Power surges hit from multiple angles
Lightning strikes near your home can send surges through local transformers into your wiring. When the grid restarts after an outage, it often delivers an additional spike, multiplying the danger.
Sudden shutdowns corrupt files
If your PC loses power mid-operation, files being saved or updated may become corrupted. Hard drives can also suffer mechanical damage from sudden shutdowns.
Unplug everything when storms hit
Shut down your PC and unplug it from the wall before extreme weather arrives. Also unplug your router, TV and other expensive electronics, as routers are frequently damaged in electrical storms.
Surge protectors and UPS systems help
A quality surge protector absorbs voltage spikes before they reach your equipment. An uninterruptible power supply adds battery backup, letting you save work and shut down gracefully during short outages.
Wait before plugging back in
After power returns, wait a few minutes to ensure it won't cut out again. Plug your surge protector in first, then your PC and peripherals.
In short
Unplugging your PC from the wall during a power outage is the simplest and most effective way to protect it from voltage surges.
