ever hear of a dead pixel on a crt?

[l3ored]

i have one. been there since i got the monitor over a year ago. (nec multisync fe991sb).

 

[YOyoYOhowsDAjello]

Where is it?

 

[volrath]

I have a dot that looks like a dead pixel but really isn't. It's like somehow something black got onto the inside of the glass.

 

[YOyoYOhowsDAjello]

I'm wondering if you're talking about the dark dot in the direct center of the screen or if it's something else.

 

[SilentZero]

Its probably something on the inside. A CRT can not have a "dead pixel", however dust inside or crap outside can give it that appearance.

 

[CJP]

I had an Nec FE2111SB that had this white dot that was a flaw in the glass I think. It looked like a dead pixel.

 

[CalvinHobbs]

the tube has coating which when hit by the electrons glows..must be something on it...dust or whatever...for CRT dead pixel doesn't apply imho..

 

[l3ored]

i looked at it with a magnifying glass, maybe it is something behind the glass

 

[PrayForDeath]

Definitely not a dead pixel. In CRTs, the same beam goes over the whole screen 60 times/second or more, so you either get a full screen or nothing.
This could be dust or somehting like that inside your screen.

 

[hopejr]

It could be a burn on the screen from it being on too long, but is highly unlikely (although there are two red dots on my CRT where my Windows 98 start button used to be - right on the red on the windows logo).

 

[sharkeeper]

Yes it's a defect in the aperture.

CRT's are analogue devices and thus do not have discrete pixel elements like TFT displays.

 

[cubby1223]

I've seen one on my crt - a grey dot that would move with the picture when I'd adjust the monitor settings. Went away when I upgraded video cards, so I assume it was the vid card being just 99.9% perfect.

That dot was within the center area, probably 2 inches down, 1 right of dead center. In other words, it stuck out like a sore thumb on a solid light background (i.e. any explorer window).

 

[dullard]

I've seen one. However I never bothered to figure out if it was (1) a video card defect, (2) an aparature hole which was plugged, or (3) dirt inside the monitor glass. It wasn't my computer or monitor, so I just ignored it.

 

[harrkev]

Originally posted by: cubby1223
I've seen one on my crt - a grey dot that would move with the picture when I'd adjust the monitor settings. Went away when I upgraded video cards, so I assume it was the vid card being just 99.9% perfect.

That dot was within the center area, probably 2 inches down, 1 right of dead center. In other words, it stuck out like a sore thumb on a solid light background (i.e. any explorer window).

Sounds to me like a bad RAM cell in your vid cards memory.

To the original poster: use your monitor's screen adjustment and start screwing your your screen size and centering. If the defect moves, your vid card is bad. If the defect stays put, RMA your monitor.

 

[Zepper]

Does it stay the same using different vid cards? Try hooking it up to a friend's confuser. I suppose the phosphor coating could be imperfect or the shadow mask/aperture grille. Or some phosphor could have flaked off. Too bad you didn't do something about it a year ago when it was new. Warranty probably over now...

.bh.

 

[mage333]

Real old CRT's get dead lines, but I've never heard of pixels until now. My friend's old NEC had 5-6 bands of lines before he replaced it. My current Sony Trinitron has a green-high line near the top and a blue-high line near the bottom. Probably our fault for leaving it on too long or overheating or something. I have no clue what causes it, or what it's technical term, I'm just putting it in the equivalent for a LCD.