Lenovo 3000 C100 Bedienungsanleitung PDF herunterladen (Seite 41)

LCD-related symptoms

Important

The TFT LCD for the notebook computer contains many thin-film transistors

(TFTs). The presence of a small number of dots that are missing, discolored,

or always lighted is characteristic of TFT LCD technology, but excessive pixel

problems can cause viewing concerns. The LCD should be replaced if the

number of missing, discolored, or lighted dots in any background is:

v XGA: 8 or more bright dots, 8 or more dark dots, or a total of 9 or more

bright and dark dots.

Note:

A bright dot means a pixel is always on (white or color.) A dark dot

means a pixel is always off (black color.)

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

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Lenovo 3000 C100 Bedienungsanleitung Seite 41