How To Repair A PC Power Supply?

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Hobbyists repair a power supply in a few different ways. Those who want to know what it’s like to fix a power supply might be interested in this article. We’ll be providing step-by-step instructions on how to repair an external power supply in this article.

Before you jump right in, it’s worth mentioning that this post has been updated with information about the new brand new power supply. We’re not going to cover repairs for home-brew PCs such as the popular SnowGenesis in this article. Since they use much less hardware, we can have a higher margin of error, but we’re not qualified to fix the equipment we don’t work on. Our goal is to be able to diagnose and repair external power supplies. I have made a step-by-step guide for repairing your power supply.

Before the guide, I want to mention things that you need To Repair A PC Power Supply by yourself.

What You’ll Need

Let’s break down the tools you’ll need for this process. Removing Components A voltmeter A multimeter PC Power Supply module jumper cables PC power supply voltmeter You’ll need a multimeter to determine whether the power supply is already vented when you unplug it from the PC. Without one, you’ll have to drop the power supply onto the floor, wrap it in paper towels, and run a meter over it to see if the wiring has been de-energized. You should also be able to see green and red warning lights (depending on the PSU) on the back of the unit. Once you’ve confirmed that the power supply is indeed vented, grab your multimeter and the voltmeter. Connect one end of the multimeter to the power supply and the other end to the battery.

[Step 1]: Remove Power Supply

Before you can fix a power supply, you have to remove it. There are several different kinds of power supplies, each with a slightly different purpose and size, so if you’re not sure what you’re doing, consider taking your PS back to the store for professional help. But for the sake of this guide, we’ll be covering only the ATX power supply — the kind found inside most PCs. So if you want to know how to remove the ITX or microATX power supply, then check out our guide to removing it.

Remove the back panel. After removing the power cable, remove the front fan cable. In some cases, you may need to remove a few other components before you get to the back panel, which will allow you to remove the power supply. If you’re getting a cheap or used PC, you may not need to remove anything else.

[Step 2]: Test Fuse

Run the non-recovery test, which is a series of a few to a few dozen charge-and-discharge cycles. The charge cycle is very fast-charging-discharge cycles that start out quick and ramp-up in speed, while the discharge cycle is slow. If your power supply starts to flash red or green, it may be damaged. Test Indicators If the indicator light doesn’t come on immediately, or if it stays on for hours or days, the power supply may be damaged.

Open the device up, remove the printed circuit board, and look for any visible damages. If you see any water damage, consider a new power supply. Digitally Discharge Use the program logic analyzer to scan your power supply for traces of corruption, which can be easily spotted by comparing with the rest of the circuitry in the device.

[Step 3]: Clean and Check Connectors

Many of us perform routine maintenance on our PCs, but there are a few extra steps to keep in mind. You’ll want to check connectors, the current draw on a motherboard, and a number of other components to make sure you have proper operating parameters and stability. As mentioned above, you’ll want to clean the connectors on your power supply.

Make sure they’re free of dust, dirt, and oil with a cotton swab or some hot, soapy water. You should also try to wipe them with a microfiber cloth to remove as many contaminants from them as possible. Depending on the component, your motherboard, and even your PC case, you may also need to clean off the contacts and insides of the PSU itself. Some cases come with specific tools for doing this, but many are just available in hardware stores.

[Step 4]: Replace Connectors

Replace Connectors Whether they are different or the same type, the one you need to replace is usually easy to identify, just look for a small pinhole labelled “Female Positive”. It should be possible to remove the connector from the circuit board, so you can replace it.

You should be able to remove the pins with a small screwdriver or similar tool. Step 1 Start by removing the top of the power supply case. There are four screws that secure the chassis to the case. Remove those screws and you can access the circuit board. It should be possible to remove all but one. Step 2 The positive side of the female connector is at the top, and the negative side is at the bottom.

[Step 5]: Replace Fuse

It’s time to rip out that fuse. Place the monitor’s power cord and the PC’s power cord on a separate table and unplug the monitor from the PC. Press the PC power button until it glows blue. The PC will turn on, but the monitor will not. While the monitor’s power cord is still attached to the PC, take the monitor, power cord, and the PC power button with you.

Buy new components It’s time to buy some new components for the monitor. I’m assuming you already bought a new CPU to replace the one in your PC. If you haven’t bought a new CPU, you should buy one soon. Even if you did, you should probably buy another GPU or a new hard drive.


It seems that the process described in this article is not that difficult and can be accomplished by anyone with a piece of basic knowledge of electricity. Note that a technical explanation of what is happening in the picture will be provided at the end of the article.

In the end, I hope you gained some insights into the different ways to repair power supplies. Btw, can you give me your thoughts on this article? Would love to hear your thoughts and comments on the subject. Article originally appeared on Don’t Waste Your Money.

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