Lenovo 3000 C200 manual Errors without messages, LCD-related symptoms

Symptom-to-FRU index

Errors without messages

Symptom or error	FRU or action, in sequence
Power-on indicator on, LCD blank, and no	1.	Make sure that every connector is
POST.		connected tightly and correctly.
	2.	DIMM.
	3.	System board.
Power-on indicator on, and LCD blank	1.	Reseat DIMM.
during POST.
	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:

vXGA: 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		System board.
blank LCD during POST.
v LCD backlight not working.		1.	Reseat the LCD connectors.
v	LCD too dark.	2.	LCD assembly.
v LCD brightness cannot be adjusted.		3.	System board.
v LCD contrast cannot be adjusted.
v	LCD screen unreadable.	1.	See important note for “LCD-related
v	Characters missing pixels.		symptoms.”
v	Screen abnormal.	2.	Reseat all LCD connectors.
v	Wrong color displayed.	3.	LCD assembly.
		4.	System board.
Horizontal or vertical lines displayed on		LCD assembly.
LCD.

38MT 8922