How to Jump Start Your Power Supply (Paper Clip Test)

Step 1: Safety and Initial Setup

For your safety, please turn off the power supply first, then set the I/O switch on the back of the power supply (if available) to the "O" position.

Image Description: The back of a power supply unit with the I/O switch clearly visible and set to the 'O' (off) position.

Step 2: Disconnect Devices

Unplug the AC power cord from the power supply.

Unplug all hardware devices cables from the power supply.

Step 3: Reconnect Power

Re-plug the AC power cord into the power supply. Make sure the AC power cord is plugged directly from a wall outlet, without any filters or UPS.

Image Description: An AC power cord plugged into the power supply unit.

Step 4: Short the 24-Pin Connector

Short between the green and black wires on the 24-pin connector using a paper clip or a piece of wire. If all wires are black, place the connector with the lock clip facing up and short the 4th and 5th pins (counting from left to right) in the upper row.

Image Description: A 24-pin ATX connector with multiple colored wires. It highlights the green and black wires and indicates pins labeled '4' and '5' in the upper row. A paper clip is shown below the connector.

Step 5: Power On and Test

Turn on the power supply; then set the I/O switch of the power supply to the "I" position.

Image Description: The back of the power supply unit with the I/O switch set to the 'I' (on) position.

If the power supply fan is running, then it is probably working.

To test fanless or semi-fanless power supplies, you may connect them to simple devices or components. For example, you can test fans that power off a 4-pin peripheral connector to see if they will spin when the power supply is turned on.

Note: Avoid using more than one device while performing the Jump Start test.

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