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User Manual - Page 1
ThinkPad Computer Hardware Maintenance Manual
February 2006
This manual supports: ThinkPad T40/T40p, T41/T41p, T42/T42p
(MT 2373/2374/2375/2376/2378/2379) ThinkPad Dock II (MT 2877)
User Manual - Page 3
...-installed system 27 Passwords 28 Power management 32 Checkout guide 35 Testing the computer 35 Detecting system information with PC-Doctor. . . 38 Power system checkout 39
ThinkPad T40/T40p, T41/T41p, T42/T42p Series
43
Product overview 45
Specifications 45
Status indicators 50
FRU tests 53
Fn key combinations 54
Symptom-to-FRU index 58
Numeric error codes...
User Manual - Page 7
..." on page 22.
© Lenovo 2006. v The product-specific section includes service, reference, and product-specific parts information. About this manual
This manual contains service and reference information for trained service personnel who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems.
The manual is intended for...
User Manual - Page 9
... prevent unnecessary expense for replacing FRUs
Before replacing parts Make sure that those settings remain in effect.
© Lenovo 2006. Introduction
Important service information
Important BIOS and device driver fixes are instructed to replace a FRU but the
replacement does not correct the problem, reinstall the original FRU before replacing any FRUs listed in this manual. v If an adapter...
User Manual - Page 31
....
v Before replacing any ThinkPad model that have been altered. When you replace a FRU, make sure that you are correct by referring to the checkout guide, be overwritten. v A FRU should service the computer. If you suspect that you go to the FRU parts list. Read this first
Before you attach to do with another FRU of servicer
© Lenovo 2006...
User Manual - Page 35
... remove a POP that message appears, press the Access IBM button. 2. Select Security, using the cursor keys to the servicer, there is known by the servicer:
For T40/T40p, T41/T41p: 1. At the Enter Current Password field, enter the SVP. 7. Press F10; Related service information
information stored in the Setup confirmation window, select Yes. Remove the backup battery...
User Manual - Page 36
... Setup Utility screen opens.
4. Select Password. 6. In the Changes have been saved window, press Enter. 9. How to remove the hard-disk password
Attention: If User only mode is selected and the user HDP has been forgotten and cannot be replaced for a message saying, "To interrupt normal startup, press the blue Access IBM button." For the ThinkPad T41...
User Manual - Page 37
...on the ThinkPad computer.
2. Select Security, using the cursor keys to Security --> Password. A pop-up window opens. 7. Related service information
4. Select Password. 6. then leave the New Password
field blank and press Enter twice. 9. then, while the "To interrupt normal startup, press the blue Access IBM button" message is displayed.
3. Type the current master HDP in the Setup...
User Manual - Page 41
... from the Access IBM Predesktop Area, do as a guide in as much detail as the serial port. Checkout guide
Checkout guide
Use the following Web site: http://www.lenovo.com/support
PC-Doctor cannot be used to test a device that depend on page 45.
Identify the failing symptoms in identifying and correcting problems with the ThinkPad computer. For...
User Manual - Page 49
... LCD models 129
© Lenovo 2006. ThinkPad T40/T40p, T41/T41p, T42/T42p Series
Product overview 45
Specifications 45
Status indicators 50
FRU tests 53
Fn key combinations 54
Symptom-to-FRU index 58
Numeric error codes 58
Error messages 62
Beep symptoms 63
No-beep symptoms 63
LCD-related symptoms 64
Intermittent problems 65
Undetermined problems 65
FRU replacement...
User Manual - Page 64
... EEPROM checksum is listed first, in the ThinkPad notebook computers, see the manual for each error detected in this section lists symptoms and errors and their possible causes. Run BIOS Setup Utility, and save the current setting by pressing F10.
2. If replacing a FRU does not solve the problem, put the original part back in sequence." Then save the current...
User Manual - Page 69
... and a blank screen.
Make sure that every connector is set. appears. Start the ThinkPad Configuration program and set . External CRT. 4. System board.
See "Numeric error codes" on password or a supervisor password is connected tightly and correctly.
2. System board. 2. DIMM. 2. A power-on page 58.
ThinkPad T40/T40p, T41/T41p, T42/T42p Series 63 DIMM.
Four cycles of...
User Manual - Page 71
... not identify the adapter or device that has failed, if wrong devices are supported by the
FRU code. Replace any FRUs. 3. Determine whether the problem has been solved. 6. LCD assembly
ThinkPad T40/T40p, T41/T41p, T42/T42p Series 65 If no error is detected, replace the FRU shown by the computer.
Turn off the computer. 2. Visually check each...
User Manual - Page 145
... system board in this figure. Removing and replacing a FRU Important notice for the HDD Active Protection System b is soldered on the underside of the system board as in ThinkPad T41 series: In ThinkPad T41 series, the security chip a is also soldered on the topside of the system board.
b
ThinkPad T40/T40p, T41/T41p, T42/T42p Series 139
User Manual - Page 146
... surface such as follows: 1. Attention: Do not apply physical shock to make sure that HDD Active Protection still functions. Removing and replacing a FRU
Important When handling the system board in ThinkPad T41 series, bear the following in any kind. v Be careful not to drop
or stack the system board. v If you must test...
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