Lenovo 3000 C200, Руководство по техническому обслуживанию аппаратной части

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Errors without messages
Symptom or error FRU or action, in sequence
Power-on indicator on, LCD blank, and no
POST.
1. Make sure that every connector is
connected tightly and correctly
.
2. DIMM.
3.
System board.
Power-on indicator on, and LCD blank
during POST.
1. Reseat DIMM .
2. System board.
The power-on password prompt appears. A power-on password or a supervisor
password is set. Type the password and
press Enter .
The hard-disk password prompt appears. A hard-disk password is set. Type the
password and press Enter .
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
38
MT 8922