Lenovo ThinkPad T420 Support Question
Lenovo ThinkPad T420 Support Question
Find answers below for this question about Lenovo ThinkPad T420.Need a Lenovo ThinkPad T420 manual? We have 38 online manuals for this item!
Question posted by pudloricard on March 13th, 2014
Thinkpad T420 Shuts Down When Undocking
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Related Lenovo ThinkPad T420 Manual Pages
Hardware Maintenance Manual - Page 1
ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 3
... underside of the system unit 62 Retaining the UUID 63 Reading or writing the ECA information . . . 63
Chapter 8. Removing and replacing a FRU 65
Before servicing ThinkPad T420 and T420i . . . 66 1010 Battery pack 67 1020 ExpressCard blank bezel 68 1030 Serial Ultrabay Enhanced device or travel bezel 69 1040 Hard disk drive...
Hardware Maintenance Manual - Page 4
... or wireless LAN/WAN antenna assembly 124 2070 Hinges and LCD rear cover assembly . . . 126
Chapter 9. Notices 175
Electronic emissions notices 176 Trademarks 177
ii ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 5
...; products. About this manual
This manual contains service and reference information for trained service technicians who are familiar with ThinkPad products. Before servicing a ThinkPad product, be sure to troubleshoot problems effectively. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237, and 4238
Use this manual along with the advanced diagnostic tests...
Hardware Maintenance Manual - Page 6
iv ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 8
Some hand tools have , near you. Do not use this type of the units.
• If an electrical accident occurs:
2 ThinkPad T420 and T420i Hardware Maintenance Manual Removing or installing main units
• Before you from passing through your back. Ensure that tester. - Use only one hand ...
Hardware Maintenance Manual - Page 10
...: 1. When working on a double-insulated or battery-operated system, use coax or connector-outside shells on these systems. - You can be verified by a certified electrician.
4 ThinkPad T420 and T420i Hardware Maintenance Manual
Use product-specific ESD procedures when they are wearing a wrist strap. • Use a grounded work mat to provide protection that...
Hardware Maintenance Manual - Page 12
... from electrical outlets, remove the battery pack, and disconnect any symptoms from the fluid are present after washing. Seek medical care if any interconnecting cables.
6 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 20
14 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 24
18 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 26
20 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 28
22 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 30
... as hard disk 1, and assigned drive D:. Whatever causes the first error code may have been changed . Important notice for the computer you are servicing.
24 ThinkPad T420 and T420i Hardware Maintenance Manual
If no error code is displayed, see whether the error symptom is installed in the system, and assigned drive C:. If...
Hardware Maintenance Manual - Page 32
Click Product & Parts Detail and then follow the instructions on the screen to view the complete list of FRUs at the MT Model level.
26 ThinkPad T420 and T420i Hardware Maintenance Manual On the Warranty Status Lookup page, click Parts Lookup. 4. Click Products & Service Warranty. 2. Type your machine type and serial number, ...
Hardware Maintenance Manual - Page 34
... warranty period, the customer may have been subjected to excessive force,
or dropped.
28 ThinkPad T420 and T420i Hardware Maintenance Manual Before checking problems with the computer, determine whether the damage... a liquid onto the keyboard • Use of an incorrect ac power adapter on laptop products
The following information in the parts exchange form or parts return form that have ...
Hardware Maintenance Manual - Page 36
...; Intel WLAN Radio Test
Notes:
• In the Keyboard test in the PC-Doctor menu. If the computer cannot be sensed.
30 ThinkPad T420 and T420i Hardware Maintenance Manual When the ThinkPad logo comes up, immediately press F12 to select ATAPI CDx (x: 0, 1, ...) and then press Enter. 7. Press cursor keys to enter the Boot...
Hardware Maintenance Manual - Page 38
... ThinkVantageToolbox also has problem determination aids that determine software and usage problems. For additional information about this program, see the Help for the program.
32 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 40
... program enables you to computers installed with the Windows 7 operating system. Select the tests to start the test.
The Lenovo diagnostics programs include following :
34 ThinkPad T420 and T420i Hardware Maintenance Manual
Hardware Maintenance Manual - Page 52
... button. - • The system is turned on, the computer returns from the hard disk drive.
46 ThinkPad T420 and T420i Hardware Maintenance Manual Also, the computer goes into hibernation
mode, perform that action. - To cause... is docked to restart the system. When the power is powered off. If you do undock it and then try to resume normal operation, you will get an error message, and you...
Hardware Maintenance Manual - Page 54
...reader is attached to the computer.
3. Undock docking station or port replicator if it is attached. Do not apply any physical shock to the ThinkPad Notebook.
2. Mini SATA device. 3. Reseat....
2. Run the ThinkPad Setup program to reset the time and date.
1. Reseat the hard disk drive. 2. Mini SATA device. 3. System board. System board.
48 ThinkPad T420 and T420i Hardware Maintenance...
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