Fujitsu L17-4, L19-2, L17-2, L17-3 manual Permanently unlit or lit pixels

LCD monitor

Having this problem?	Check the following points:
Picture is shaking	► Check whether the data cable for the monitor is
	correctly attached to the monitor port on the
	computer.
	► Carry out the auto-adjustment of the monitor (with
	the AUTO button - if present - or via the OSD menu).
Picture disturbances (vertical lines)	► Carry out the auto-adjustment of the monitor (with
	the AUTO button - if present - or via the OSD menu).
Picture disturbances	► Carry out the auto-adjustment of the monitor (with
(horizontal lines, picture noise)	the AUTO button - if present - or via the OSD menu).
Picture too light or too dark	► Carry out the auto-adjustment of the monitor (with
	the AUTO button - if present - or via the OSD menu).
	► Correctly set the contrast and brightness with the
	OSD menu if the auto-adjustment function does not
	supply satisfactory results.
Permanently unlit or lit pixels

The standard of production techniques today cannot guarantee an absolutely fault-free screen display. A few isolated constant lit or unlit pixels may be present. The maximum permitted number of pixels faults is stipulated in the stringent international standard ISO 13406-2 (Class II).

Example: a 15" flat-screen monitor with a resolution of 1024 x 768 has 1024 x 768 = 786432 pixels. Each pixel consists of three subpixels (red, green and blue), so there are almost 2.4 million dots in total. According to ISO 13406-2 (Class II), a maximum of 4 pixels and 5 subpixels may be defective, i. e. a total of 17 faulted dots.

A 17" flat-screen monitor with a resolution of 1280 x 1024 has 1280 x 1024 = 1310720 pixels. Each pixel consists of three subpixels (red, green and blue), so there are almost 4 million dots in total. According to ISO 13406-2 (Class II), a maximum of 6 pixels and 7 subpixels may be defective, i. e. a total of 25 faulted dots.

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