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Service Hints & Tips

Document ID: GSMH-3C8HXD

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TP General - N51 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	LCD Hinge Covers (Press down on the hinge cover and slide it forward until the tabs clear the bezel.)
3	Two Screws (T) with Flat Washers (At bottom of bezel plate)
4	Screen Bezel Plate
5	Four Screws (2-T, 2-H) (At display corners) Upper Right Screen Cable Left Center Screen Cable Lower Right Screen Cable
6	Two Hinge Screws (V) with Flat Washers (One on each hinge)
7	Screen Sub-Assembly
8	Backup and Standby Batteries (When installing backup battery, align wires with edge of voltage converter. Ensure wires do not extend beyond edge of voltage converter or they might be damaged when you replace bottom cover.)
9	Five Screws (4-E, 1-V) (On bottom cover)
10	Bottom Cover Ribbon Cable from Diskette Drive Battery Cable Voltage Converter Cable
11	Keyboard Cables
12	Three Voltage Converter Screws (2-H, 1-T)
13	Voltage Converter (Voltage converter consists of three boards. Gently lift voltage converter up to unplug two connectors from system board.)
14	Four Diskette Drive Cables (These cables are very fragile. Be very careful when disconnecting them.) Four Diskette Drive Screws (H)
15	Diskette Drive
16	Speaker
17	Two Battery Bracket Screws (B)
18	Battery Bracket
19	Two Hard Disk Drive Cables (These cables are very fragile. Be very careful when disconnecting them.) Two Hard Disk Drive Screws (H)
20	Hard Disk Drive (Have customer backup all information on hard disk drive before removal. When replacing hard disk drive, use customer's backup Reference Diskette to restore system partition.)
21	Upper Left System Board Cable Six System Board Screws (2-L, 4-H) Lower Left System Board Cable Upper Left System Board Cable Upper Right System Board Cable Two Cables, System Board Top Edge
22	Two Screws (T) and Keyboard Control Card (When replacing keyboard control card, make sure that switch setting on card is correct for type of keyboard used.)
23	System Board (Run Automatic Configuration and set time and date.)
24	Two Battery Connector Card Screws (H)
25	Battery Connector Card
26	Six Keyboard Screws (H) (Four front and two rear keyboard assembly screws. Two rear screws are located in line with two battery connector card screws.)
27	Two Speaker Bracket Screws (B)
28	Speaker Bracket
29	Keyboard Assembly
30	Three PC Board Screws (H)
31	Rear Panel PC Board

Model N51 Exploded View:

Model N51 Exploded View (continued):

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	10-12-96
	Last Updated	01-05-98
	Revision Date	28-04-99
	Brand	IBM ThinkPad
	Product Family	Notebook N51
	Machine Type	8551
	Model
	TypeModel
	Retain Tip (if applicable)	N/A
	Reverse Doclinks and Admin Purposes