First, read the English article below.

This should be done before doing any kind of PC repair work which requires opening a computer. If you neglect this step, you may damage your computer. This may include keyboard, mouse, network cable and speakers. It will be connected to almost every component inside the computer case and will look something like this: Unscrew the mounting screws on the back of the case which hold the power supply in its housing.  Place the screws in a handy location. This is usually a simple process, but if there is little room in your PC, it may be necessary to remove other components to get the power supply out. If you don't feel comfortable removing other components, replace the mounting screws and enlist the help of a PC expert before continuing. Do not try to yank a power supply out by force. 

Now, please write a short abstract for it in Indonesian. Abstract:
Pelajari prosedur ESD dengan baik. Putuskan semua sambungan konektor eksternal (termasuk kabel daya di dalam komputer). Identifikasi unit pemasok daya. Lepaskan casing komputer. Copot pemasok daya lama dari komputer.