It's unusual for a bad pixel to be black, since it's generally individual subpixels that go bad. The visual effect of that is that one color component (red, green, or blue) will be stuck on or off. Since it's black, and not yellow, magenta, or cyan, I'm inclined to think it's a spec of dust inside the display.
Look at it under a microscope. See if it is in front of, at the same level as, or behind the image on screen. I have an old T23 with a dead ant or two on the display. On Sep 28, 2010 5:29 AM, "Bernard Chan" <[email protected]> wrote: > Hello all, earlier this year I bought a T400 to replace an older thinkpad > and it had been working flawlessly. > > Lately however I noticed a black speck near the center of the screen. At > first I thought it was some dirty spot or something but the speck still > remained after wiping the screen clean. Is this what people call a 'bad > pixel'? It seems a bit disheartening when the machine has seen less than a > year of use. Can anything be done about it? The fact that the speck is near > the center makes it a nuisance -- if it is near one of the corners I am > inclined to pretend that nothing happens. I assume this will not be accepted > as a reason for a replacement of the screen, right? > > Thanks. > > -- > > Kind regards, > > Bernard Chan > _______________________________________________ > Thinkpad mailing list > [email protected] > http://stderr.org/cgi-bin/mailman/listinfo/thinkpad _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
