How to Repair a Laptop Power Supply

Written by craig brewer
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The most common source of problems with laptop power supplies is that the wire to the connector jack is often ripped out of place. To fix this, you only need to know how to fix an alternating current (AC) wire, which is quite simple to accomplish with only minimal tools.

Skill level:

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Things you need

  • Wire cutters
  • Electrical tape
  • Aluminium foil

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    How to Repair a Laptop Power Supply

  1. 1

    Remove the wire from both the laptop and the outlet.

  2. 2

    Cut the wire at any point beyond the damaged area so that you can make a clean cut. It is best to leave at least a few millimetres between the damaged area and the cut to ensure that there is no damage to the wires you are going to reconnect.

  3. 3

    Cut the damaged wire from the connector jack leaving as much undamaged wire as possible. This can often be difficult if your jack was damaged close to the end. Remember, however, that the thicker casing near the jack still contains basic wire and can be cut if need be. It is only thicker for support purposes.

  4. 4

    Carefully start to cut the outer plastic of both ends of the cut wire about a centimetre from the end. Do this gently as you do not want to cut the wires wrapped around the inner insulation. Remove the excess plastic.

  5. 5

    Move the wrapped wires out of the way, and gently cut the inner insulating plastic only a few millimetres from the end. You will only need a tiny bit of exposed cord for this inner wire.

  6. 6

    Intertwine the two ends of the inner wire, and wrap this connection with a small piece of electrical tape. Make sure the wires maintain as much connection as possible and that the tape does not bend.

  7. 7

    Wrap the outer wire around the electrical tape, making sure the outer wires overlap. If there is not enough outer wire near the jack (a common problem), use a small piece of aluminium foil to complete the connection. Tape this tightly with electrical tape.

  8. 8

    Secure the entire connection with a complete wrap of electrical tape, and test your connection.

Tips and warnings

  • Since power sources are often damaged by being accidentally yanked out of the laptop, you can use a device like the JerkStopper to prevent such accidents (see link in Resources).
  • If the wire grows warm around the connection, either redo the entire process or consider replacing your power source. Excess heat is an indication that there is something wrong other than the power source itself.

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