What kind of test should I run on my plasma to check for faulty pixels?
November 18, 2007 7:50 PM   Subscribe

What kind of test should I run on my plasma to check for faulty pixels?

I originally thought just a simple test with a white and a black image would be OK. Now I'm seeing other people testing their panels with a range of different colours. So, which is the correct and best way?

Background: I've bought a 60" Pioneer Kuro and the first two units have come with defective pixels. I'd like to conduct a conclusive test on the third one when it arrives. I returned the others.
posted by sjvilla79 to Technology (5 answers total)
Best answer: Typically, full screen renditions of the colors of each subpixel that gives off light. Typically full red, full blue, and full green. A screen of each, and you'll see any dead "subpixels" as black. You'd also want to run a screen of black to check for hot pixels.

Doing the check with a full screen of white is harder because if the blue subpixel is dead on a single pixel, it can be hard to make out yellow against white.
posted by wackybrit at 7:55 PM on November 18, 2007

Usually plasmas will have "burn-in" prevention features. One of these might be a "white screen".. which displays nothing but 100% white.

It is easy to test for dead pixels and subpixels with taht screen, just look at it about 2 feet away. If your screen is 40" or larger that should be far enough- just make srue you can see each pixel made up of the three primaries. Look around for any BLACK pixels (completely dead). Then, look around for any discolored pixels (means one of R G or B are dead).

It is very rare for any high-end plasma (like pioneer) to have ANY dead pixels (much less of a chance than LCD screens have).

The screens showing many colors are to calibrate the screen. i.e. make sure black and white are as close to pure as possible- and make sure the hue of all other colors are accurate. sOme of the calibration screens also test edge defition, sharpness, and other factors.

Look up DVE or "Digital Video Essentials" by "Joe Kane Productions" to obtain a disc of your own.
posted by Ryaske at 7:57 PM on November 18, 2007

As wackybrit said - try to find a way to feed a pure black picture to the plasma. That can eb done by waiting for yoru DVD player to go into standby, for example.

The only problem.. make sure you feed somethign that is dead rather than nothing at all. Nothing at all my cause yoru TV to say something along of the lines of "searchign for signal" and not a totally black screen.

a pure white and pure black screen is all you really need to find any stubborn pixels.

Again, VERY rare you will have any. it is much easier for LCD pixels to break than plasma
posted by Ryaske at 8:00 PM on November 18, 2007

Response by poster: Cheers!
posted by sjvilla79 at 8:23 PM on November 18, 2007

I'd suggest just watching it for a little while and if you don't notice anything, it passes the test.
posted by Mr. Gunn at 9:21 PM on November 20, 2007

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