T520 T520i W520 Hmm En 0A60078 08

Hardware Maintenance Manual

ThinkPad T520, T520i, and W520

Note: Before using this information and the product it supports, be sure to read the general information under Appendix A 'Notices' on page 163.

Ninth Edition (May 2013) © Copyright Lenovo 2011, 2013.

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration 'GSA' contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.

Contents

About this manual.

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Chapter 1. Safety information.

General safety .

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Electrical safety

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Safety inspection guide

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Handling devices that are sensitive to electrostatic discharge.

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Grounding requirements .

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Safety notices (multilingual translations) .

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Laser compliance statements (multilingual translations) .

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Chapter 2. Important service information

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Strategy for replacing FRUs

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Strategy for replacing a hard disk drive

Important notice for replacing a system board

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How to use error codes

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Strategy for replacing FRUs for CTO, CMV, and

GAV .

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Product definition.

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FRU identification for CTO, CMV, and GAV

products

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Chapter 3. General checkout .

What to do first

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Checkout guide

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System supporting the Lenovo ThinkVantage

Toolbox program and the PC-Doctor for DOS

diagnostics program

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System supporting the Lenovo diagnostics programs .

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Power system checkout .

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Checking the ac power adapter

Checking operational charging

Checking the battery pack

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Checking the backup battery

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Chapter 4. Related service information

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Restoring the factory contents by using Recovery

Disc Set

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Passwords

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Power-on password.

Hard-disk password.

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Supervisor password

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How to remove the power-on password .

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How to remove the hard-disk password . . .																43
Chapter9.Removing and
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65
Before servicing W520 . . . . . . 1010 Battery pack .
T520, . . . .
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.	. T520i, .	. .	. ECA .		Retaining the UUID . Reading or writing the	.	.	. .	.	. .				.	. .	. . . 63
.	. or	.		1020 Serial bezel . . 1030 DIMM 1040 DIMM						.
.	.	68	(bottom Hard disk		. . drive				.
		1050 drive	drive				. .
		slot		.
	69
	or
(HDD) and HDD	rails		.							rubber
cover, . .	solid .	. . .							.
	FRU . . . . . . ThinkPad . . . . Ultrabay . . . . . .	.				.	.	.	. .	.
.	72					.			information	.	. a .	63
						replacing				66 67	Enhanced	.
				device .		and	. .		. .	66
					.	.	travel .	.			. .	.
					.	. .	.						.
		slot cover.			.						.
	slot).				.		.	.
	hard
									disk state
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.		.	.	.	1070 DIMM			.		. slot)
	.						76		(SSD) and storage converter		.
				.	.	1060 Keyboard	(upper			.	.	.		.
.	. . . . . . . . . . . . . . . . . .	UEFI	. . . . . . . . . . . . and . . functionality . . indicators replacement . . . .	number	Power management . . Screen blank mode . Sleep (standby) mode Hibernation mode . Symptom-to-FRU index . Numeric error codes Error messages . . Beep symptoms . . No-beep symptoms . LCD-related symptoms Intermittent problems Undetermined problems Chapter 5. Installing RAID. . . . . . . Supported RAID levels . Configuring the system embedded SATA RAID Creating RAID volumes . Deleting RAID volumes . Chapter 6. Status Chapter 7.Fn key Chapter8.FRU notices . . . . . Screw notices . . . . . Retaining serial numbers. Restoring the serial unit . . . . . . .	. .	. . . . . . . . . . . . . . to . . . . . the .	. . . . . . . . . . . . . . . . . . . . .						. . . . . . . . . . . . . . BIOS . . combinations . . . of .	. . . . . . . . . . . . configuring . . . . . . . . . .	. . . . 44 . . . . 44 . . . . 44 . . . . 45 . . . . 45 . . . . 46 . . . . 47 . . . . 48 . . . . 48 . . . . 49 . . . . 49 . . . . 49 . . . . 51 . . . . 51 enable . . . . 51 . . . . 52 . . . . 52 . . . . 53 . . . 57 . . . . 61 . . . . 61 . . . . 62 system . . . . 62

Table Caption: This table appears to be an index or table of contents for a technical manual, likely related to computer hardware maintenance and troubleshooting, with specific references to ThinkPad models and their components like hard drives, RAM, and keyboards.

Table Caption: This table appears to be an index or parts list from a technical manual, providing component names, corresponding part numbers, and page numbers.

Rear view.

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About this manual

This manual contains service and reference information for the following ThinkPad ® products.

ThinkPad T520 and T520i Machine type (MT) 4239, 4240, 4241, 4242, 4243, 4244, and 4246 ThinkPad W520 MT 4249, 4260, 4270, 4276, 4281, 4282, and 4284

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.

Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 'Safety information' on page 1 and Chapter 2 'Important service information' on page 25.

Chapter 1. Safety information

This chapter presents following safety information that you need to be familiar with before you service a ThinkPad Notebook.

• 'General safety' on page 1
• 'Electrical safety' on page 2
• 'Safety inspection guide' on page 3
• 'Handling devices that are sensitive to electrostatic discharge' on page 3
• 'Grounding requirements' on page 4
• 'Safety notices (multilingual translations)' on page 4
• 'Laser compliance statements (multilingual translations)' on page 17

General safety

Follow these rules to ensure general safety:

• Observe good housekeeping in the area of the machines during and after maintenance.
• When lifting any heavy object:

1. Make sure that you can stand safely without slipping.
2. Distribute the weight of the object equally between your feet.
3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.
4. Lift by standing or by pushing up with your leg