Danger
Potentially Dangerous
Injury may result if this procedure is not followed properly. Use caution and follow all warnings.
Danger

Introduction

This shows you how to replace a blown power supply on a Dell Optiplex 330 small form factor PC. Power supplies are normally the first part to go on a desktop and will result in a solid amber power light illuminated on a Dell desktop.

Image 1/3: It is strongly recommended that you leave the computer off for at least 15 minutes to allow the components to cool down. Image 2/3: You should also ground yourself before starting by using an anti-static band or touching a metal object connected to the ground. This prevents static build up which can destroy sensitive components. Image 3/3: You should also ground yourself before starting by using an anti-static band or touching a metal object connected to the ground. This prevents static build up which can destroy sensitive components.
  • Before you start make sure that all of the leads have been disconnected from the computer.

  • It is strongly recommended that you leave the computer off for at least 15 minutes to allow the components to cool down.

  • You should also ground yourself before starting by using an anti-static band or touching a metal object connected to the ground. This prevents static build up which can destroy sensitive components.

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Image 1/3: In order to release the case pull this latch straight back - this should make the back of the case pop up. Image 2/3: You can now just lift the case up and away from the computer. Image 3/3: You can now just lift the case up and away from the computer.
  • Round the back of the computer next to the power supply you will find a latch.

  • In order to release the case pull this latch straight back - this should make the back of the case pop up.

  • You can now just lift the case up and away from the computer.

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Image 1/2: First find the two cables going into the optical drive - they are shown in the first picture. Image 2/2: Gently pull both of them out - one of the cables might have a little latch that you have to press in order to release it from the optical drive.
  • Before you can remove the power supply you first have to remove the optical drive.

  • First find the two cables going into the optical drive - they are shown in the first picture.

  • Gently pull both of them out - one of the cables might have a little latch that you have to press in order to release it from the optical drive.

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Image 1/3: Pull the latch straight up - at the same time pull the optical drive back. It should now be easy to remove it from the computer. Image 2/3: Pull the latch straight up - at the same time pull the optical drive back. It should now be easy to remove it from the computer. Image 3/3: Pull the latch straight up - at the same time pull the optical drive back. It should now be easy to remove it from the computer.
  • To remove the optical drive first find the little blue latch located next to the optical drive.

  • Pull the latch straight up - at the same time pull the optical drive back. It should now be easy to remove it from the computer.

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Image 1/3: You now need to remove the power cable from the hard drive. Image 2/3: Gently pull the cable out of the back of the hard drive. Image 3/3: Gently pull the cable out of the back of the hard drive.
  • It should now look like the first picture with the optical drive removed.

  • You now need to remove the power cable from the hard drive.

  • Gently pull the cable out of the back of the hard drive.

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Image 1/3: Locate the large 24 pin power connecter - it is located next to the power supply. Carefully press down on the little latch and pull straight up to release. Image 2/3: Repeat this procedure for the little 4 pin connecter located between the processer and hard drive. Image 3/3: Repeat this procedure for the little 4 pin connecter located between the processer and hard drive.
  • You now need to remove the power cable connected to the motherboard.

  • Locate the large 24 pin power connecter - it is located next to the power supply. Carefully press down on the little latch and pull straight up to release.

  • Repeat this procedure for the little 4 pin connecter located between the processer and hard drive.

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Image 1/3: You can now slide the power supply straight back and lift it straight up and out of the computer. Image 2/3: It should look like the last picture after the power supply is removed. Image 3/3: It should look like the last picture after the power supply is removed.
  • In order to remove the power supply you have to first remove two screws connecting the power supply to the case.

  • You can now slide the power supply straight back and lift it straight up and out of the computer.

  • It should look like the last picture after the power supply is removed.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

8 other people completed this guide.

Oli

Member since: 01/03/2014

647 Reputation

4 Guides authored

2 Comments

Would this be the first item to go bad if the computer is simply not powering on?

Edgar - Reply

If nothing at all was happening when the computer was switched on then certainly its highly likely that the power supply is bad although it could also be a faulty motherboard.

Oli - Reply

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