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Service Hints & Tips

Document ID: GSMH-3C7EU3

This document is provided to IBM and our Business Partners to help sell and/or service IBM products. It is not to be distributed beyond that audience or used for any other purpose.

Laptop L40SX - FRU Removals And Replacements

Applicable to: World-Wide

FRU Removals and Replacements:
Follow the numerical sequence in the FRU removal sequence list and the exploded view to remove or disconnect parts in the correct order. The letters in parentheses in the list indicate screw types. See the -- 'Screw Size Chart' -- to match the letters to the correct screw type and size before replacing each screw.

Safety Notice 8:
Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, then disconnect any interconnecting cables.

Safety Notice 1:
Before the computer is powered-on after FRU replacement, make sure all screws, springs, or other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts.

1	Battery Pack
2	Three Screw Covers and Three Screws (C)
3	Loosen Keyboard Assembly (Raise front until it clears case.)
4	Two Ribbon Cables and Keyboard (Slide keyboard forward and flip it over in front of computer.)
5	Three Top Cover Screws (C) (Inside right and left rear access doors along top edge)
6	Two Status Display Ribbon Cables
7	Top Cover (Use small screwdriver to release latch on left side, if necessary.)
8	Two Status Display Screws (F) (One on each end)
9	Status Display Assembly (contains on/off and power saver switches)
10	Four Hinge Screws (C) (Two on each end, inside two rear access doors)
11	Left Hinge Cables
12	Right Hinge Cables
13	LCD Assembly
14	Memory Modules (Do not install two 4MB memory module kits. Install a 2MB memory module kit in connector 1 and a 4MB or 8MB memory module kit in connector 2.)
15	Two Screws (F) (At front edge of diskette drive)
16	Two Diskette Drive Ribbon Cables
17	Diskette Drive and Drive Mounting Bracket
18	Standby Battery
19	Battery Shield
20	Backup Battery
21	Adapter Bezel
22	One Screw (F) (In corner of serial/modem card)
23	Serial/Modem Card
24	Two Screws (F) (At front edge of hard disk drive)
25	Two Ribbon Cables and Hard Disk Drive (Have customer backup all information on hard disk drive before removal.)
26	External Adapter and Battery Doors
27	Eight System Board Screws (F)
28	One Screw (C) (Inside right-rear access door)
29	Two Threaded Hex Spacers (Inside right-rear access door) Remaining System Board Cables
30	System Board (When replacing system board, install old memory module kits and math coprocessor on new system board. Run Automatic Configuration using customer's backup Reference Diskette.)
31	Speaker

Model L40 Exploded View:

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	09-12-96
	Last Updated	15-04-98
	Revision Date	02-04-99
	Brand	IBM ThinkPad
	Product Family	Laptop L40
	Machine Type	8543
	Model	Various
	TypeModel
	Retain Tip (if applicable)	N/A
	Reverse Doclinks and Admin Purposes