How to fix dead pixels on LCD monitors ?

LCD monitor dead pixel guide

So you really want a beautiful new LCD monitor but are a little worried about dead pixels?

Dead pixels are not the major issue they used to be. Manufacturing techniques have improved to the point that there are far fewer monitors produced with dead pixels that ever before.

So what exactly is a dead pixel?

To understand this question you need to know the basics to how a LCD display works. Basically it's simple, a LCD display has pixels that make up a single unit each pixel is made up of sub pixels which actually make the colors (red, green and blue). Furthermore a faulty or dead pixel may be permanently white or black.

So on an LCD monitor a dead pixel will basically be fixed color of some kind or black or white. Manufacturers these days seem to all have different methods of determining whether a pixel is in fact dead. It seems strange that some manufacturers will NOT count a pixel as dead or defective if it permanently unlit or black! While unlit pixels are not as noticeable as permanently lit pixels it seems a real stretch to classify a pixel that does not show any colors as a functional pixel.

So what can you expect if you find some dead pixels

This depends on what brand you've bought. Whenever you spot a dead pixel on an LCD display under warranty you should contact your supplier. The results you get will depend on your monitor brands policy.

As of writing this the best brands are:

* Lite On, Phillips and Hitachi. All three have a zero tolerance to dead pixels but Phillips doesn't count unlit pixels as dead.

* HP will only replace a monitor with there are 4 scattered faulty pixels or 3 clustered.

* LG will replace a monitor if there are 2 within a 10cm circle.

* NEX-NEC will replace 3 lit, 3 unlit or 6 color.

* Samsung could try harder. Six dead pixels allowed on a 15", or nine on a 17", are too many.

* Sony will replace if on a 15" panel there is 2 lit, 2 unlit or 4 dead. On 17" panels Sony will replace if there are 3 lit, 3 unlit or 7 dead.

* Viewsonic will replace if on a 15" panel there is 2 lit, 2 unlit or 4 dead. On 17" panels Viewsonic will replace if there are 3 lit, 3 unlit or 7 dead.

Conclusion on dead pixels

As LCD monitors increase in resolution dead pixels become much harder to spot.

In the end I like the policy of zero tolerance towards dead pixels and I think it would be a good idea to support manufacturers such as Hitachi, Lite On and Phillips. I guess that if they can be confident in their ability to produce flawless LCD monitors then it's an indication that they are producing good quality displays.

How to fix dead pixels on LCD monitors ? Reviewed by LCD On Saturday, September 24, 2011, at 6:24 AM Rating: 5
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