CHANGE AND REPLACE PSU ALL COMPUTER
The Power Supply (also known as the Power Supply Unit or PSU) is what powers your computer and its various components. From motherboards and hard drives to fans and CD-ROM drives, the power supply unit is the fuel mechanism. Every time the electricity wears out, especially the fan in the power supply. If this fan becomes slow or fails to actuate, the power supply will overheat causing damage to both the supply and computer elements. Power surges can result in electrical failure. If you want to add more drives or fans to your mechanism, you will likely need a power supply unit with more volts.
First you have to turn off the computer and take all the network including the power supply cable, monitor, and each device.
Apart from the computer case and looking for a power supply, you will see some cables running to other devices in the computer case.
Break the ties one by one. Make sure the hard drive, motherboard, fans, disk drive, and any other electrified elements are disconnected from the current power supply cable before proceeding.
Free the screw on the back of the computer case that is on the power supply into place. In most computers, the case holder with the power supply box and couplers can be seen near each corner of the stand. Hold it with your hand under the power supply while removing the screw to prevent the power supply from falling onto other elements.
Position the new power supply into place and in the gripping screw. You must move the power supply assembly to the back side of the computer in this case, making sure the fan and socket side are facing the back side of the computer.
Reconnect all hard drive, disk drive, fans, and motherboard power lines. See if some networks are smaller than others, eg 4 wire ties are used in things like disk drives which need more capability. wrote that some fans and other devices can connect to the power grid unit via an adapter. Make sure this network fits and connect completely.
Use plastic cable ties to secure extra cable ties that twist from the unit, if you don't want them to touch the inside of the computer or get tangled in the fans.
Swap all cases and peripheral connectors back in. Plug in the power supply cable and turn on the computer. If the installation goes well, all devices will be supported and the computer will work properly.
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