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.

How to Troubleshoot A Dead Computer by Robert Desacada
Is your Computer starting to act differently that sometimes it refuses to turn on? Or your Computer looks completely dead.? If you are experiencing this kind of Computer problems, all you need is just some troubleshooting techniques to try and free all your worries and headache. ... Next, check the power between the power supply you use and the motherboard on the back of your computer. ... Then turn on the power just to see if the power supply is still running. ... The first thing you should do is check the power supply just to be sure that there is power available for your 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.

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.

How To Troubleshoot And Repair DELL E151FP LCD Monitor With No Power Problem by Jestine Yong
The DELL E151FP LCD Monitor came in with no power symptom and upon opening up the cover I saw few components that were burnt. R623 (4.7 ohm) burnt at the side and you could still recognized the resistor color code. The current sense resistor (0.68 ohm) outer layer partly had came off and... Whether you are troubleshooting the DELL E151FP LCD Monitor or other brands, you can always use the procedure given above to repair the power supply problem. ... No matter what types of power supply you are troubleshooting, just make sure you know how to check and test the basic electronic components.

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!

JVC VCR Problems In Model HR-J321EM-No Power by Jestine Yong
A customer sent me a JVC HR-J312EM model VCR for repair. The complaint was no power. I personally don’t repair VCR because I’m more on computer monitor repair. Because of he is a friend of mine; I told him that I’m willing to take the challenge to repair it. ... However, certain electronic equipment power supply designed, the capacitor may still hold charge even the start up resistors seems to be working. ... Therefore no ac voltage produced at the secondary side of the power supply. ... If either one of the start up resistor developed an open circuit, there would be no supply voltage to...

Understanding TOP223P And PQ05RD11 IC In Thompson DVD Power Supply by Jestine Yong
The TOP223P pulse width modulation ic is designed to work in switch mode power supply (smps). It is mainly used in the audio/video electronic equipment. Computer monitor rarely use this type of ic. In this article, I would like to share with you that not all switch mode power transformer must... Conclusion-Troubleshooting power supply that used the TOP223P ic or other family type is very easy if you understand how power supply work and if you have the schematic diagram of a particular equipment.

How To Repair Dell E152Fpb LCD Monitor by Jestine Yong
The complaint for this DELL E152Fpb LCD Monitor was when switched on has power (LED lit) but no display. LCD Monitor is different from the CRT Monitor where you could feel the static at the front of the picture tube or hear the rushing sound from the high voltage produced by the flyback... It could be components that are faulty that dragged down the line or it could be the switch mode power supply itself that don’t produce enough power. ... Pin 9 is the VCC supply input and it should have about 12 Volts when the power is “on”.

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...