How to replace a computer power supply?

How to replace a computer power supply?

Replacing the power supply is pretty basic and similar in all models. The most important factor is making sure that the model you buy to replace the defective unit is the same or higher in wattage as the old one. Using one that is isn't can lead to problems due to an insufficient wattage.

Contacting the manufacturer or taking the component with you to purchase the new part is going to be the best way to ensure that you have the correct part number. Once you have made the purchase the only thing you will need is some space to work in. This area needs to be free of static electricity once you are ready to begin.

To replace the power supply, complete the following steps.

1. Test the power supply with a power tester, in this case since the fan no longer turns it is probably safe to say that the power supply is failing.

2. Remove the power plug and all peripherals like the keyboard, mouse, etc. from the machine.

3. If you don't have an anti-static wrist strap available, touch you bare hand to a metal surface. This will discharge any static electricity and ensure there is no damage to the machine.

4. Remove the case, place the screws somewhere that they can be found again easily.

5. Remove the 20 or 24-pin connector from the motherboard, disengage the plastic clasp and rock the connector back and forth gently to loosen it. Remove any remaining connectors to the hard drive, cd-rom, etc.

6. There should be several screws on the back of the computer holding the power supply in place, remove then and lift the power supply out of the case.

7. Install the new power supply and insert the screws to hold it securely in place.

8. Re-connect the connectors to the motherboard, hard drive, and cd-rom. Any components that were removed in the step above.

9. Replace the case cover and screws.

10. Re-attach all peripherals and plug the machine in.

11. Verify that all components are working correctly.

The most important thing is to remember that the width of the new power supply should match the old unit perfectly. If the new unit has a larger, bottom mounted fan you may find the new unit is a little longer. This will not affect anything. Also verify
that no cables or connectors are stuck in the fan or have come into contact with other moving parts.

This can damage the processor quickly. I recommend restraining any unused cables with cable ties. Blow out any remaining dust and dirt particles that you may have come across gently.

The post did not have any specs for the machine listed but the process is pretty much the same no matter what model you are working with. If you have any problems, please post the specs for this machine and I will be happy to provide you with some additional information regarding the correct part numbers.