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LCD resolution Bright dots Dark dots Bright and dark dots
XGA, WXGA 5 6 6
WXGA+, SXGA+,
WSXGA+
5 8 10
UXGA, WUXGA,
QXGA
5 13 13
Notes:
1. Lenovo will not provide replacement if the LCD is within specification as we
cannot guarantee that any replacement LCD will have zero pixel defects.
2. A bright dot means a pixel is always on (white or color.)
3. A dark dot means a pixel is always off (black color.)
4. One pixel consists of R, G, B sub-pixels.
Symptom or error FRU or action, in sequence
No beep, power-on indicator on, and a
blank LCD during POST.
System board.
v LCD backlight not working.
v LCD too dark.
v LCD brightness cannot be adjusted.
v LCD contrast cannot be adjusted.
1. Reseat the LCD connectors.
2. LCD assembly.
3. System board.
v LCD screen unreadable.
v Characters missing pixels.
v Screen abnormal.
v Wrong color displayed.
1. See important note for “LCD-related
symptoms.”
2. Reseat all LCD connectors.
3. LCD assembly.
4. System board.
Horizontal or vertical lines displayed on
LCD.
LCD assembly.
Symptom-to-FRU index
50 MT 8747, 8749, 9440, 9441, 9442, 9443, and 9448