you must be grounded via a grounding strap, which consists of a condective strap around your wrist (contacting your skin) a resister (usually about 1 megaohm) and a connection to earth ground.
to stay grounded and prevent static electricity from ruining components in the computer.
PRESUMING you have already unplugged it and removed the cover, ground yourself by attaching a grounding strap to your wrist and the computer case to prevent static discharge
Anti-static wrist bands or anklets help ground a person and divert static electricity. This is useful when a person works in demolition. A spark can ignite plastic explosives, and the anti-static wrist bands greatly reduce the likelihood that static electricity would detonate the materials prematurely.
the wrist strap will prevent computer components from being damaged by static electricity.
Anti static mat
A computer operates by working with pulses of electrical energy. Depending on the voltage of the pulse, it represents either a zero or a one. Electricity is also need to spin the disc drives.
Static electricity may build up and discharge through the circuits you are working on. This may damage them. Removing the ground cable, removes the discharge path to ground.
Metal wires clipped to their bodies act as grounding straps to prevent the buildup of static electricity. This helps protect sensitive electronic components from being damaged by electrostatic discharge during the assembly or repair process.
Electrical accidents can be prevented by ensuring the electricity is switched off before working on anything electrical. Wearing rubber shoes when working with electricity is also recommended.
Anti-static wrist straps are worn on a person's wrist to safely ground them while working on electronics to prevent damage from electrostatic discharge. Anti-static bags are used to store electronic components and devices to prevent static electricity buildup and protect them from damage. Both are important tools in preventing damage to sensitive electronics from static electricity.
The second step in opening the case of a working computer is to ensure that the computer is powered off and unplugged from the electrical outlet. This is crucial for safety to prevent electrical shock or damage to the components. Additionally, it's advisable to ground yourself to avoid static electricity that could harm the internal parts. After that, you can proceed to remove any screws or fasteners holding the case in place.
A ground bracelet can also be called an anti static strap. Those people who assemble integrated circuits onto motherboards of computers find them essential. As IC are static sensitive you need to prevent the static electricity in you from damaging the IC you are handling. Slip strap on wrist, attach other end onto large metal object, handle IC with confidence.