IBM R30, R31 manual LCD-Related Symptoms, Lcd

LCD-Related Symptoms

LCD FRU Replacement Notice

The TFT LCD for the computer contains many thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots (on all the time) 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.

Symptom/Error	FRU/Action in Sequence
LCD backlight does not	v Keyboard (if contrast and
work.
		brightness function keys do not
LCD is too dark.		work)
	v
LCD brightness cannot		Reseat LCD connector
	v Check LCD inverter ID
be adjusted.
	v	LCD Cable ASM
	v	LCD Inverter/LED board
		(13.3″/14.1″)
	v	LCD
	v	System board
Unreadable LCD screen.	v	Reseat LCD connector
Missing pixels in	v	Check LCD inverter ID
characters.	v	LCD Cable ASM
Abnormal screen	v	LCD Inverter/LED board
		(13.3″/14.1″)
Wrong color displayed.	v	LCD
	v	System board
LCD has extra horizontal	v Check LCD inverter ID
or vertical lines
	v	LCD Cable ASM
displayed.
	v	LCD Inverter/LED board
		(13.3″/14.1″)
	v	LCD
	v	System board

44ThinkPad R30/R31 HMM