TP 380Z - LCD and peripheral device related symptoms

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Service Hints & Tips

Document ID: LWIK-3XNRAZ

TP 380Z - LCD and peripheral device related symptoms

Applicable to: World-Wide

The following information is intended for IBM Dealers and Authorized Servicers only. Customers attempting to follow any of the procedures below may void their warranty.

LCD-Related Symptoms
Important

The TFT 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 missing, discolored, or lighted dots in any background is 21 or more.

Symptom / Error

FRU / Action in Sequence

No beep, power-on indicator on, and a blank LCD during POST

1. Reseat the CPU card
2. DC/DC card
3. System board

1. LCD backlight not working
2. LCD too dark
3. LCD brightness cannot be adjusted
4. LCD contrast cannot be adjusted

1. Reseat the LCD connectors
2. LCD inverter card
3. LCD assembly
4. System board

1. The LCD screen is unreadable
2. Some pels missing in characters
3. The screen is abnormal
4. Wrong color displayed

1. See important note for "LCD-Related
Symptoms"
2. Reseat all LCD connectors
3. LCD assembly
4. System board

LCD has extra horizontal or vertical lines displayed

LCD assembly

Peripheral-Device-Related Symptoms

Symptom / Error

FRU / Action in Sequence

The external monitor does not work correctly

Connect the external monitor to another PC. If the monitor works fine, replace the system board. If not, replace the external monitor

Printer problems

1. Run printer self-test
2. Parallel port wrap test
3. System board
4. Printer cable
(See the printer manual for the above tests)

Serial or parallel port device problems

1. Run serial or parallel port wrap test. (See
the device manual for the test)
2. Device
3. System board
4. Device cable

Search Keywords

Hint Category

Hardware Maintenance Information

Date Created

24-08-98

Last Updated

19-01-99

Revision Date

19-01-2000

Brand

IBM ThinkPad

Product Family

ThinkPad 380Z

Machine Type

2635, 2636

Model

Various

TypeModel

Retain Tip (if applicable)

Reverse Doclinks
and Admin Purposes

Symptom / Error	FRU / Action in Sequence
No beep, power-on indicator on, and a blank LCD during POST	1. Reseat the CPU card 2. DC/DC card 3. System board
1. LCD backlight not working 2. LCD too dark 3. LCD brightness cannot be adjusted 4. LCD contrast cannot be adjusted	1. Reseat the LCD connectors 2. LCD inverter card 3. LCD assembly 4. System board
1. The LCD screen is unreadable 2. Some pels missing in characters 3. The screen is abnormal 4. Wrong color displayed	1. See important note for "LCD-Related Symptoms" 2. Reseat all LCD connectors 3. LCD assembly 4. System board
LCD has extra horizontal or vertical lines displayed	LCD assembly

Symptom / Error	FRU / Action in Sequence
The external monitor does not work correctly	Connect the external monitor to another PC. If the monitor works fine, replace the system board. If not, replace the external monitor
Printer problems	1. Run printer self-test 2. Parallel port wrap test 3. System board 4. Printer cable (See the printer manual for the above tests)
Serial or parallel port device problems	1. Run serial or parallel port wrap test. (See the device manual for the test) 2. Device 3. System board 4. Device cable

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	24-08-98
	Last Updated	19-01-99
	Revision Date	19-01-2000
	Brand	IBM ThinkPad
	Product Family	ThinkPad 380Z
	Machine Type	2635, 2636
	Model	Various
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes