Dead pixle CRT

Radon199 · Post by **Radon199** » Sun Dec 11, 2005 4:30 pm

I know LCDs can get dead pixles or stuck pixles. But what about CRT TVs?

I'm wondering because my old 21" RCA TV from like 1982 has, if you look really damn closely, a green dot that always stays green or black but not red or blue. If you look really closely there are tinny pixles made of red, green and blue bars... I don't know maby it's a common thing but it's the first time i've seen or heard of anything like this.

daguuy · Post by **daguuy** » Sun Dec 11, 2005 4:32 pm

it's phospher burn in. plasmas and CRTs can get it

timmeh87 · Post by **timmeh87** » Sun Dec 11, 2005 5:12 pm

but on a single pixel?

Jeff · Post by **Jeff** » Sun Dec 11, 2005 5:13 pm

Its due to something magnetic near it. My TV used to have it when I put a Subwoofer right under it.

timmeh87 · Post by **timmeh87** » Sun Dec 11, 2005 5:16 pm

once again... only on a single pixel? thats some very specific burn-in/magnetic field.

perhaps the pixel has been like that since 1982. manufacturing defect

Radon199 · Post by **Radon199** » Sun Dec 11, 2005 5:40 pm

Ya it's only on one pixel, in the middle to the upper left, all the others around it are fine.

nos_slived · Post by **nos_slived** » Sun Dec 11, 2005 8:22 pm

Isn't that what deguass is supposed to fix?

Post by **marshallh** » Sun Dec 11, 2005 8:26 pm

Degaussing only affects the deflection yoke, I'd guess the problem is with the missing phosphur elements at that pixel. Like tim said it's probably a defect. Old tvs are strictly analog and there's no other way just a single pixel can just stop working (if it was a e- gun or yoke problem the whole image would be affected)

teraflop122 · Post by **teraflop122** » Sun Dec 11, 2005 9:12 pm

If you look really closely there are tinny pixles made of red, green and blue bars...

You are describing how all displays produce color, with red, gren, and blue sub-pixels.

I've seen some CRT's that have a funny little additional pixel on the middle of the top or middle of the bottum, which is always the same color. Probably a result of manufacturing techniques or restrainst.