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LCD TV Problems

LCD which means Liquid Crystal Display has become popular as a technology in TV sets today. The basic principle on which this works is that liquid crystal is placed between two sheets of clear material and is back lit to display an image. This is not the same as a plasma screen TV that works by lighting up small plasma cells filled with neon-xenon gas. Although LCD TVs are known for their sharp and clear displays, like every electrical gadget, they too can occasionally run into problems. These could vary from colored lines appearing on the screen to internal component failures that lead to the TV not coming on at all.

Listed below are a few questions answered by the Experts on LCD TVs.

After my Samsung LCD TV started displaying vertical colored lines across the screen, I replaced the T-con board and the main board. However, the problem still persists. What could be causing this?

Based on what you have said, if you have replaced both the boards, it seems like the fault lies with your actual LCD panel. You could replace it but it is very expensive to do so. For more information on replacing it, click here: http://www.encompassparts.com/item/8022226/Samsung/BN07-00671B/Lcd-panel

A more economical option would be to try and recover a part of your costs by selling the boards on eBay, along with other TV parts, and look for a new TV to replace this one instead.

I have a red light that blinks next to the power light on my 3 year old Samsung LCD TV which refuses to turn on. I checked the cable, rebooted the TV and unplugged it as well for a while. How can I fix the problem?

This is not an unusual problem. Very often, what happens is that either the power supply fails or a few caps in the power supply fail. To fix this, you would need to replace a few components. You could do this on your own if you have soldering and test equipment along with some electronic repair experience. However, if you are not confident doing this on your own it’s always better to hire a professional. Also, get in touch with Samsung and explain your problem. Depending on the nature of your case, they may fix the problem free of charge as well.

How do I get rid of pink dots on my Samsung LCD TV screen?

Case details: They initially reduce in number when I switch the TV off and then on again but come back later.

It is possible that you have a problem with your power supply capacitors. You could attempt to fix this on your own. First take off the back of the TV by unscrewing the nuts that hold it together. Examine the central power board and find the puffy capacitors which don’t have flat tops. You could either choose to replace the whole board or just the replace the capacitors.

For more information on replacing capacitors, click here: http://www.shopjimmy.com/samsung-bn44-00167c-power-supply-unit.htm. If you decide on replacing the parts, ensure that you do a good job of soldering.

However, it may be easier to change the whole board. To order this on ebay, visit the link below.
http://compare.ebay.com/like/110720612984?var=lv<yp=AllFixedPriceItemTypes&var=sbar&_lwgsi=y&cbt=y

My 42 inch Philips LCD is not turning on and the power light just blinks rapidly with an audible rapid chirping sound. What can I do?

Case details: 2 year old unit, noise emanates from the back of PC

From what you have described, it seems like an internal failure and all you can do at this stage is unplug the TV and try turning it back on. However, there are a few reasons why this could have happened:
1. There could be a power supply failure caused by a failed capacitor. This could cost around $175-$200 to fix. Replacing the power supply could cost around $350.
2. It could also be that the main board has become faulty. This is far more expensive to fix and could cost around $400-$500.
3. The fault could also lie with your panel. In this case, it may cost you around $800 without labor charges to fix and is probably more than a new set. Therefore, it would be more economical to buy a new TV if you are sure that you have a faulty panel.

You could troubleshoot these problems yourself with the right equipment and experience. However, if you are not comfortable doing it on your own it would be better to get a professional to diagnose the problem correctly and help you fix it.

While you may have come across some of the problems mentioned above, there could be other issues that concern viewing angles, motion clarity, contrast ratios and more that could be specific to your television. While you can attempt to fix some of these on your own, others may need professional intervention. Whatever your problem, direct your questions to a TV Technician to get a better understanding of how to tackle the issue in the quickest and most cost-effective way.
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