LCD-Related Symptom (765D-9546, 765L-9547, 770-9548/49)

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

LCD-Related Symptom (765D-9546, 765L-9547, 770-9548/49)

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-9548 see > LCD Pixel Policy Change
For M/T-9549 see > LCD Pixel Policy Change

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. Video card
	4. System board
	5. LCD cable assembly

° LCD backlight not working, or	1. Reseat the LCD connectors.
° LCD too dark, or	2. LCD Assembly
° LCD brightness cannot be adjusted, (TFT)	3. DC/DC card
	4. Cable for inverter card
	5. Inverter card

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

LCD has extra horizontal	1. LCD cable Assembly
or vertical lines displayed.	2. LCD Assembly

More INFORMATION / HELP is available at the IBM-HelpCenter

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