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Repair LCD Power Supply The Easy Way

Troubleshooting LCD monitor power supply pack is easier than the crt monitor power supply. It is small and compact and usually has only one output which is 12 volt and range from 2 ampere to over 4 ampere. Some designed have 18 and 24 volts also. Nowadays most LCD power supplies are build into the main board such as the Dell E151FP LCD Monitor while the older type were separated as power pack module.

The power pack module type is easy to diagnose because you can replace another working unit just to make sure is the power pack that giving problem. You may also use an external dc power supply to power up the LCD to confirm if the power pack is faulty. If you do not have the external dc power supply, you can always use this method to isolate the problem especially the symptoms are no power, low power and power blink. Using the rear light bulb (12 volt) from a car and connect it to the power pack output jack. If it light brightly then the power pack is okay. If it blink or dim the power pack have problem. Why have to use this method to test it? Because, if there are components shorted or leaky at the LCD main board, it will affect the power supply performance. If you have any questions concerning where and how to use Goldshell Miner, you can make contact with us at our site.

From experienced, most of the LCD power supply problems whether in the power pack or built into main board were due to the failure of electrolytic capacitors (most probably due to heat) in the primary and secondary section. Most of the capacitors have a high ESR which causes the power supply to produce low output, blink or no power at all. Typical value electrolytic capacitors in the primary side are 47 and 100 micro farad 50 Volt and the secondary sides are 1000 to 2200 micro farad 25 volt. Sometimes you can see the capacitor top casing became bulge and the sleeve that covered the capacitor casing turned into darker color like brownish.

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How to Install a Desktop Power Supply

In this article we discuss how to install a desktop power supply. In learning how to install computer components, this is one of the easier tasks--yet also one of the most dangerous. The power supply delivers juice to your desktop, so follow the safety precautions below before you start.

Also, if you're building a computer from scratch--as we assume--you're probably doing a fresh install of your power supply, and not replacing an old one. So we'll skip any explanations about how to remove an old power supply, although we think you'll figure that out after completing this lesson.

1. Safety Precautions and Opening Up the Case

Knowing how to properly install computer power supply units begins with a review of safety. Your new power supply has plugs that will power the computer as well as various devices in your desktop. Handle it with care, and be very careful not to poke around in its vents with any objects.

Your power supply also has the ability to retain electric charges even after you've unplugged it. It's good to know these things in advance so we don't make any foolish mistakes.

Now the first order of business is to remove the case. The method for doing this will vary depending on your system. If you have a mini-tower, then unscrew the side panel above the motherboard and slide it off. Set the screws in a safe place. If you have an older model of computer, then you will probably have to unscrew the whole back cover, and completely slide the chassis out.

2. Align and Secure the Power Supply

The next step in learning how to install a desktop power supply is to align it with the case and then secure it properly. This part can be very tricky. Basically, your power supply has four mounting holes that match the four mounting holes on the back of your computer case. You will also notice that the power supply is a somewhat heavy, lumbering unit.

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