Your LCD TV Repair Hub

My Sylvania 32″ LCD tv broke and I want to know if it is worth fixing…?

We bought this 32″ LCD sylvania tv for $400 about 2.5 years ago. About a year ago i turned it on and got a grey screen and no sound. We just unplugged it and put it back in the Read the rest of this entry »

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Many times I received the same questions from my students and friends asking whether electronic repair service line is a dying trade. My answer to them was it depends on how you treat your electronic repair business. In other words, how do they run Read the rest of this entry »

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Benq LCD Monitor Gone Dark – Any Schematics To Repair It?

I can't find anything faulty on the Benq PCB board and the monitor itself has gone dark. Not sure if it's working; any guide to repair this myself?

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I hope you’ve been enjoying my posts lately. I thought I might do something different today and rustle up a few bits of info from around the WWW. These are some of the news items and blog posts that have been popular over the last few weeks. Leave me Read the rest of this entry »

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I recently bought a samsung 2032NW monitor, and upon installation, I've noticed 1-2 faint horizontal stripes rolling down the screen. It's translucent, except for making the black background a shade lighter, and it blurs anything it comes over. I've updated the drivers and tried different resolutions, but it hasn't gone away.

Is there:
A) A technical term for this horizontal sweep
B) Anything I can do to resolve this blurring issue?

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 slightly burnt and the filter capacitor c605 (68uf 400v) one of the pins had became rusted and came off when I tried to desolder the pin.

This is not a new model and I believe lots of experienced techs had solved the problem. But for those who haven’t come across this problem, you may use the procedure to troubleshoot and repair any other type of LCD Monitor with power problem.

I will first remove the power transformer and make sure it rings okay with dick smith flyback tester. I do this first because I don’t want to waste my time checking other components and later only found out that the power transformer is the caused of the power problem. Once it rings okay I will measure all the secondary diode. For your information most LCD Monitor power supply widely used the dual schottky type diodes and the specification usually in the 10 to 20 amp with about 40 volts. However I do come across some designed are still uses the ultra fast recovery type diodes in the secondary section. Make sure you know how to check a normal diode and a schottky diode. Refer back to my website in the diode section and search for testing schottky diode article. I will then check for the ESR of electrolytic capacitors too.

Once I confirmed that the secondary side components are all tested okay, I would then proceed to remove all the components in the primary side. Some components in the primary side you can check on board like the bridge rectifier and fuse. If I’m new to the LCD Monitor model I would check all components off board (with a lead removed from board). With this way you will be sure that all components you have scanned through.

These are the components that I found defective; fuse-2A, R615-0.68 ohm, R613- 1K, R612-47 ohm, R623-4.7ohm, D604-1N4148, Q601-SSS6N60A, C605-68UF 400V and IC601-UC3842B. Total was nine components and it took me less than 20 minutes to check all the components in primary side. Now is the time to search for spare parts. After spending about 5 minutes in the spare part compartment I managed to find all components except the power fet SSS6N60A.

Though this part number is mostly used in switch mode power supply, my electronic supplier does not have this stock. I would then browse through the semiconductor databook to search for equivalent part number. From the book, it suggests to use the K1118 as replacement. After all components have put into their original place or location and of course with the power transformer soldered, I don’t immediately switch on the power supply. I would first use a 100watt light bulb connected in series with the live line. The best place to put the light bulb is the fuse holder area. Remove one of the fuse lead and connect the light bulb across it. Power it on and begin to observe the bulb. If it brightly lit and stay that way then there is still problem in the power supply. However, if the bulb doesn’t light at all then this is a good sign that the power supply may be working.

Use a multimeter to place at the secondary side with power on. If you get some accurate voltage reading from the outputs and the bulb doesn’t light at all, then this confirmed that the power supply is working. Switch off the power supply and connect back the fuse and turn the LCD Monitor on again. I’m very sure the LCD Monitor will now work.

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. This method can be even use to repair other types of power supply too. No matter what types of power supply you are troubleshooting, just make sure you know how to check and test the basic electronic components. If you ever miss one, sad to say you would not be able to solve the problem or it might just take you many of your precious hours to complete the job. Happy hunting!

Jestine Yong is a electronic repairer and a writer, for more lcd monitor repair information, please visit his website at http://www.electronicrepairguide.com/lcd-monitor-repair.html

Article Source:

http://EzineArticles.com/?expert=Jestine_Yong

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LCD Monitor, Scrolling horizontal stripes blurring text?

I recently bought a samsung 2032NW monitor, and upon installation, I've noticed 1-2 faint horizontal stripes rolling down the screen. It's translucent, except for making the black background Read the rest of this entry »

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There are actually 3 of them .. my little sister says that she had lip gloss on her fingers and touched the screen. I am being told that the lip gloss would not cause this.. so what would.. It was not a magnet.. Any helpfull web sites would be nice too…

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How To Repair Dell E151Fpb LCD Monitor – No Display Problem

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In this article, I will tell you about the importance of learning LCD repair and tell you How to Learn to Repair All Types of LCDs. The CRT TV is being phased out slowly. LCD is the way to go. The LCD sales are increasing worldwide so there is an Read the rest of this entry »

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I hope you’ve been enjoying my posts lately. I thought I might do something different today and rustle up a few bits of info from around the WWW. These are some of the news items and blog posts that have been popular over the last few weeks. Leave me Read the rest of this entry »

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Life is precious, everybody knows that. And nobody wants to lose their own life or the life of someone they love just because they were not keen enough on taking the necessary precautions and preparation for some accidents that could have been prevented or given emergency response if only they have medical alert devices on hand during those times. This is the main reason why medical alert devices manufacturers continuously create modern and innovative products to serve the purpose of providing immediate help at the times when they are needed most. With this technology, you will never have to worry too much that you are left alone in the house because you are handicapped or incapable of moving around.

Medical alert devices are useful products of technology taking the shape of different jewelleries. These kinds of devices have the capability to speak for you during those emergency cases in which you can’t speak for yourself. With this idea in mind, indeed you would come to realize that medical alert bracelets are really worth your life. Children with medical conditions, adults with old-age health disorders, people who have seizure-related conditions, individuals who have just undergone a surgical procedure, someone with other disabilities are those groups of individuals who would really benefit from medical alert devices.

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