|If you have a desktop/tower system; ensure you remove the power cord - rather than simply switching the computer off. |
With modern desktop/tower systems if the power cord is still pugged into the mains socket and that is live) and also still connected to the desktop/tower, there will be volts running around inside - even f you have switched the system of via the on/off switch/button. So ensure you remove mains power cord completely from such systems before going inside...
With laptops... remove the power adapter connection "and" the battery.
message edited by trvlr