When a bearing in the power supply fan goes out, what should you replace?

When a bearing in the power supply fan goes out, you should replace the entire fan. Here are the steps to do so:

1. Unplug the power supply: Before you start, make sure to unplug the power supply from the wall to avoid any electrical accidents.

2. Open the computer case: You will need to open your computer case to access the power supply fan. This usually involves removing a few screws.

3. Identify the faulty fan: The power supply fan is typically located at the back of the power supply unit. If the fan is not spinning or making a grinding noise, it's likely the bearing has gone out.

4. Remove the faulty fan: To remove the fan, you will need to unscrew it from the power supply unit. Be careful not to damage any other components in the process.

5. Purchase a replacement fan: You will need to purchase a new fan that is the same size as the old one. Make sure it is compatible with your power supply unit.

6. Install the new fan: Screw the new fan into the power supply unit where the old one was. Make sure it is secure.

7. Close the computer case: Once the new fan is installed, you can close up your computer case.

8. Plug in the power supply: Plug your power supply back into the wall and turn on your computer to make sure the new fan is working properly.

Remember, if you're not comfortable doing this yourself, it's best to hire a professional.