Choosing the right DC Power Supply for your Application by Bob Preville
The DC Power Supply is a rather fundamental electronic device, however there are hundreds of DC Power Supply products on the market from dozen of manufacturers. Narrowing down the best product for your application and budget can be a daunting task. This article addresses DC Power Supply... Realistically, no power supply is 100% efficient because power conversion always results in energy loss, usually in the form of heat dissipation. ... Choosing the right DC power supply for your application requires definition of some basic design specifications: voltage range, current range, number of...

Repair LCD Power Supply The Easy Way by Jestine Yong
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... If you are unsure of how to troubleshoot power supply, I urge you to read all my power supply articles at the power supply page. ... 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.

Testing Capacitor-How To Test A Capacitor When Breakdown Under Load by Jestine Yong
Have you ever come across power problem where once you switch on the power supply and the fuse blow? You have checked all the components in the power (primary) and secondary section and all the components seems to be ok! Where is the fault? A fuse blown are usually caused by a shorted bridge... Everytime when i switch on the power supply the fuse blow immediately (the fuse became dark color and this indicate that there is a major short circuit in the power supply). ... I have checked all the components in the power supply and can't find the culprit!

Taking the Guess Work Out of Computers With Hardware Issues by Cory Mioc
Today many computer technicians are frustrated with the unpredictability of various computer problems due to the environment that computers operate in today. Because 90% of all computer users in the United States use it to surf the internet, many computers get infected with malicious programs... The first step is using our ATX power supply tester to determine if the power supply is bad. ... The power supply tester can inform you in 5 seconds if the power supply is in fact functioning properly. ... The power supply could be bad and not supplying adequate power to the motherboard or other...

Learn How To Diagnose Power Supply Problems by Otis F Cooper
The Power Supply convert's your regular household current into low DC voltage used by the computer. When this component fails,there is simply no activity going on wih your computer.Remember to do the easy troubleshooting first.Inspect the Power Supply for any damage.Double-Check all connections. ... CHECKING THE POWER SUPPLY If the wall outlet,and the power cord are good,make sure the connection at the motherboard is secure.Then you may have to face the fact that the power supply itself is bad.If you have a Multimeter you can test the power supply output before purchasing a new one.Simply...

Testing Transformer - 3 Proven And Simple Methods To Test Transformers by Jestine Yong
Testing transformer is very easy if you follow the procedure explained in this article. Generally there are two types of transformer in the market i.e. the linear type and the switch mode power transformer. In this article I’m only explain on how to test the linear transformer. ... 2) With power off, remove the transformer from the board and perform a resistance or continuity test on primary and secondary winding as shown on the picture of transformer below. ... Conclusion- The first method is the best choice to test linear transformer accurately, but first you must know how transformer...

How To Repair Dell E173fpb LCD Monitor Easily by Jestine Yong
Troubleshooting DELL E173FPB LCD Monitor with power blink symptom is quite easy if you know the right procedure to test it. There are two sections in the monitor that can cause power to blink. It is either primary or secondary section or even sometimes both sections can be faulty. ... If the 12 volts bulb lights up we can assume that the power supply is working fine and something shorted further down the line that makes the power supply to blink. ... If any components shorted that gets the supply from the 5 and 3.3 volts, the power also may blink.

Samsung 153V LCD Monitor Power Supply Repair Tips by Jestine Yong
Troubleshooting Samsung 153V LCD power supply is just like troubleshooting those crt type. This monitor came in with no power symptom. If you are first time repairing this type of power supply, I recommend you to first remove the switch mode power transformer. ... After carefully checking all the components in the power supply section, I found the filter capacitor do not have any reading using digital capacitance meter (open) , the two round type fuse also open circuit, 1N4744 15 Volt zener diode short circuit and lastly the power ic TOP247F blown!

ATX Power Supply Repair And Troubleshooting by Jestine Yong
Customer ATX power supply came in with the complaint of intermittent no power. When testing it with power on, I could see that the fan is not rotating. Not only that, some filter capacitors also became bulge because of the heat accumulated inside the power supply. ... If you switch off a working power supply and power removed, touch the power transformer, you could feel it is quite warm. ... After replacing the capacitors, removed the decayed glue and service the fan, the Atx power supply again given a new life to faithfully serve the computer.

5 Frequently Asked Questions about Computer Sound Problems by Gary Hendricks
Computer sound problems can be very frustrating. The truth is that troubleshooting sound problems is a little different than most other troubleshooting because the usual troubleshooting approach of stripping the PC down to bare essentials often doesn’t apply. ... Answer: Your speakers require either an external power supply or batteries to power the amplifier, which is what implements the volume control. ... Make sure that you have fresh batteries or the appropriate power supply and that the power switch is turned on.