Computer Power Supply Repair

If your notebook computer's power supply goes bad, then here is a tutorial for you. Remove the connecting wires from the box of power supply. The wires seldom get bad, its mostly something inside the plastic casing, which eventually has to be opened.

Cut the plastic casing from one corner using a saw.

                                         Then pry it open using a flat head screwdriver.

Here is the opened power supply.

Visually inspect the main solders for any bad one.

Confirm the suspected bad solder with a multimeter, using resistance check (continuity).

Here are the points near the electrical connector which get hot and may melt. These had gone bad in my case.

Now prepare your soldering iron. If it does not have a sharp edge, use a side-cutting pliers to make a sharp edge.

Use an electronic soldering roll.

The point where soldering was done is pointed to with a screwdriver.

Its time to check the repair.

Now plug in the power supply into wall socket and check if it is providing the necessary dc voltage at the laptop power connector end. The required dc voltage would be noted on the plastic box of the power supply.

Use a plastic-special adhesive to close the plastic box of power supply.

You can leave the cut open, it would serve to cool down the power electronics inside. Just take care not to introduce any liquids inside.