LCD-Related Symptom (TP 380XD,385XD,380Z-2635

^{IBM-AUSTRIA - PC-HW-Support 30 Aug 1999}

LCD-Related Symptom (TP 380XD,385XD,380Z-2635 - 560Z-2640)

LCD-Related Symptoms

The LCD for the notebook computer contains over 2.359.296 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 dots satisfies the following condition:
The number of missing, discolored, or lighted dots in any background is 21 or more.

For M/T 2635 see LCD Pixel Policy Changed
For M/T 2640 see LCD Pixel Policy Changed

Symptom / Error	FRU / Action in Sequence

No beep, power-on indicator on,	1. Reseat the CPU card

and a blank LCD during POST.	2. DC/DC card
	3. System board

° LCD backlight not working, or	1. Reseat the LCD connectors.
° LCD too dark, or	2. LCD invertercard (380Z)
° LCD brightness cannot be adjusted, (TFT)	3. LCD assembly
° LCD contrast cannot be adjusted, (TFT)	4. System board.

° LCD screen unreadable, or	1. See (above) important note
° Characters missing pels, or	for "LCD Related Symptoms"
° The screen is abnormal.	2. Reseat all LCD connectors.
° Wrong color displayed.	3. LCD Assembly
	4. System Board

LCD has extra horizontal	1. LCD Assembly
or vertical lines displayed.

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