Change power supply - how it works

You can easily replace a defective power supply in your computer yourself - even without in-depth knowledge. If the computer is still under warranty and the power supply is no longer working, you should contact the specialist dealer or the manufacturer of the computer. This usually has to repair the PC free of charge, whereas the warranty could be void if the repair is carried out independently.

The computer's power supply is quickly replaced

Before you start with the expansion, switch off the computer and disconnect it from the power supply.

• First, open the computer by loosening the screws on the panel. If you are not too experienced with PC hardware, take your smartphone or camera and take pictures of the connections of the power supply. This will help you find your way around later if you use the new power supply.
• Once you have photographed all the connections of the power supply, carefully remove the cables from the motherboard. Press the small hooks on the plugs down before you pull them off.
• After removing all cables, unscrew the power adapter and carefully pull it out of the computer.

Install the new power supply

After removing the old power supply, insert the new power supply and connect the cables to the mainboard. If you are not sure where which cable belongs, simply refer to the photos you took earlier.

• After connecting all the cables, briefly turn on the computer to see if everything is working properly. Make absolutely sure that there are no screws or other foreign objects in the housing.
• If your computer is running properly, switch it off and disconnect it from the power supply.
• Finally, all you have to do is screw on the power supply and close the PC again.

There are a few things to consider when choosing the new power supply for your computer. In the next practical tip, we will explain how much watt your power supply needs.