Sudden stimulation of the nerves or convulsive contraction of the muscles that is caused by the discharge through the body of electricity from a charged source, OR exposing yourself to live electrical circuits

Avoid sharp edges on the sheet metal inside some computer cases. Use caution when unplugging some connectors, because they can require much effort and may come apart abruptly, causing injury to the hand.

Electronic components, especially CPUs, can become very hot. Use caution when touching electronic parts.

Transfer of electrical charge between any two objects, although not usually dangerous to the technician, ESD can cause permanent damage to internal computer components, such as RAM

Special precautions, such as wearing a wrist strap, must be taken when servicing equipment to avoid:

Troubleshooting falls into two categories:

Involves troubleshooting of the computer components such as the motherboard, RAM, hard drive, etc.

Involves troubleshooting the operating system and applications installed on the computer.

operating system is the software which controls the operation of the computer and its components. Examples are:

Common problems of OS troubleshooting include:

Hardware troubleshooting may consist of:

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