Dead Pixel Tester - TFT screens have thousands of pixels, on a 1024x768 monitor, there are three cells for each pixel - one each for red, green, and blue - which amounts to nearly 2.4 million cells (1024x768x 3 = 2,359,296). There's only a slim chance that all of these will be perfect; more likely, some will be stuck on (creating a "bright" defect) or off (resulting in a "dark" defect). Simply select a color then closely inspect your monitor in each of the primary colours checking for pixels that are not operating as expected. Stuck pixels (always on) are easier to noticed then pixels that are not on due to their size (normally under .5mm).
||Windows NT 4 SP 6Windows 2003 SP 1Windows XP AMD 64-bitWindows XP 64-bit SP 1Windows NT 4 SP 2Windows 2000 SP 1Windows 2003 64-bitWindows 2003 AMD 64-bitWindows XP 64-bit SP 2Windows NT 4 SP 3Windows 2000 SP 2Windows Server 2003 x64 R2Windows 2000Windows 2003 64-bit SP 1Windows Vista AMD 64-bitWindows XP Itanium 64-bitWindows NT 4 SP 4Windows 2000 SP 3Windows NT 4Windows XP 32-bitWindows XP SP 1Windows Server 2003 x86 R2Windows MEWindows 2003 Itanium 64-bitWindows NT 4 SP 5Windows 2000 SP 4Windows Vista 32-bitWindows XP 64-bitWindows NT 4 SP 1Windows Server 2008 x64Windows NT 3Windows Server 2008 x86Windows XPWindows Server 2008Windows 2003Windows Vista Itanium 64-bitWindows XP Itanium 64-bit SP 1Windows 2003 32-bitWindows XP Itanium 64-bit SP 2Windows XP SP 2Windows 95Windows 98Windows VistaWindows NTWindows 2003 Itanium 64-bit SP 1Windows XP Pro