TP 600/E - LCD, modem, and PC Card related symptoms

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Service Hints & Tips

Document ID: LWIK-3YGN2Y

TP 600/E - LCD, modem, and PC Card 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. System board

LCD backlight not working.
LCD too dark.
LCD brightness cannot be adjusted.
LCD contrast cannot be adjusted.

1. Reseat the LCD connectors.
2. LCD assembly
3. System board

LCD screen unreadable.
Characters missing pels.
Screen abnormal.
Wrong color displayed.

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

LCD has extra horizontal or vertical lines displayed.

1. LCD assembly

Modem (DSP)-Related Symptoms

Symptom / Error

FRU / Action in Sequence

In OS/2, DOS, or Windows multimedia programs, no sound comes from the computer. (Only system beeps are heard at power-on.)

Check that the device driver is installed correctly.

In OS/2, DOS, or Windows, the modem does not work.

Check that the DSP Modem is active.
OS/2 and Windows:
Click on the DSP Modem icon in the ThinkPad
Configuration program.
DOS:
Run the MWMODEM ON command.

PC Card-Related Symptoms

Symptom / Error

FRU / Action in Sequence

PC Card does not work in either the upper slot or the lower slot.
Diagnostic error code:
DEV 080
ERR 33
FRU 7210

1. Reseat the PCMCIA slot assembly.
2. PCMCIA slot assembly
3. System board

PCMCIA slot pin is damaged.

PCMCIA slot assembly

PC Card does not work.

1. Reseat the PC Card
2. Check that the PC Card is enabled in the ThinkPad Configuration program
3. Reseat the PCMCIA slot assembly.
4. PCMCIA slot assembly
5. System board

Search Keywords

Hint Category

Hardware Maintenance Information

Date Created

19-09-98

Last Updated

19-01-99

Revision Date

19-01-2000

Brand

IBM ThinkPad

Product Family

ThinkPad 600, ThinkPad 600E

Machine Type

2645, 2646

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. System board
LCD backlight not working. LCD too dark. LCD brightness cannot be adjusted. LCD contrast cannot be adjusted.	1. Reseat the LCD connectors. 2. LCD assembly 3. System board
LCD screen unreadable. Characters missing pels. Screen abnormal. Wrong color displayed.	1. See important note for LCD-Related Symptoms above. 2. Reseat all LCD connectors. 3. LCD assembly 4. System board
LCD has extra horizontal or vertical lines displayed.	1. LCD assembly

Symptom / Error	FRU / Action in Sequence
In OS/2, DOS, or Windows multimedia programs, no sound comes from the computer. (Only system beeps are heard at power-on.)	Check that the device driver is installed correctly.
In OS/2, DOS, or Windows, the modem does not work.	Check that the DSP Modem is active. OS/2 and Windows: Click on the DSP Modem icon in the ThinkPad Configuration program. DOS: Run the MWMODEM ON command.

Symptom / Error	FRU / Action in Sequence
PC Card does not work in either the upper slot or the lower slot. Diagnostic error code: DEV 080 ERR 33 FRU 7210	1. Reseat the PCMCIA slot assembly. 2. PCMCIA slot assembly 3. System board
PCMCIA slot pin is damaged.	PCMCIA slot assembly
PC Card does not work.	1. Reseat the PC Card 2. Check that the PC Card is enabled in the ThinkPad Configuration program 3. Reseat the PCMCIA slot assembly. 4. PCMCIA slot assembly 5. System board

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	19-09-98
	Last Updated	19-01-99
	Revision Date	19-01-2000
	Brand	IBM ThinkPad
	Product Family	ThinkPad 600, ThinkPad 600E
	Machine Type	2645, 2646
	Model	Various
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes