Hardware Maintenance Manual
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...No-beep symptoms 50 LCD-related symptoms 50 Intermittent problems 52 Undetermined problems 52 Chapter 5. 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...mode 45 Symptom-to do first 28 Checkout guide 29 System supporting the Lenovo ThinkVantage Toolbox program and the PC-Doctor for CTO, CMV, and GAV products 25 Chapter 3. Contents About this manual iii Chapter 1. FRU replacement notices 61 Screw notices 61 Retaining serial numbers ...
...No-beep symptoms 50 LCD-related symptoms 50 Intermittent problems 52 Undetermined problems 52 Chapter 5. 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...mode 45 Symptom-to do first 28 Checkout guide 29 System supporting the Lenovo ThinkVantage Toolbox program and the PC-Doctor for CTO, CMV, and GAV products 25 Chapter 3. Contents About this manual iii Chapter 1. FRU replacement notices 61 Screw notices 61 Retaining serial numbers ...
Hardware Maintenance Manual
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... 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
... 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
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... tests to troubleshoot problems. Important: This manual is intended only for the following ThinkPad® products. Before servicing a ThinkPad product, be sure to troubleshoot problems effectively. About this manual along with ThinkPad products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual This manual contains service and reference information for trained...
... tests to troubleshoot problems. Important: This manual is intended only for the following ThinkPad® products. Before servicing a ThinkPad product, be sure to troubleshoot problems effectively. About this manual along with ThinkPad products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual This manual contains service and reference information for trained...
Hardware Maintenance Manual
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... of a plastic dental mirror. If an electrical accident occurs, you when working with the reflective surface of the units. • If an electrical accident occurs: 2 ThinkPad T420 and T420i Hardware Maintenance Manual Working near equipment that another person, familiar with very high voltages;
... of a plastic dental mirror. If an electrical accident occurs, you when working with the reflective surface of the units. • If an electrical accident occurs: 2 ThinkPad T420 and T420i Hardware Maintenance Manual Working near equipment that another person, familiar with very high voltages;
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... ground clip to provide protection that meets the specific service requirement. When working on these systems. - You can be verified by a certified electrician. 4 ThinkPad T420 and T420i Hardware Maintenance Manual Use the round ground prong of the computer is especially useful when handling ESD-sensitive devices. • Select a grounding system, such as fully...
... ground clip to provide protection that meets the specific service requirement. When working on these systems. - You can be verified by a certified electrician. 4 ThinkPad T420 and T420i Hardware Maintenance Manual Use the round ground prong of the computer is especially useful when handling ESD-sensitive devices. • Select a grounding system, such as fully...
Hardware Maintenance Manual
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DANGER Unless hot swap is allowed for at least 15 minutes. Seek medical care if any interconnecting cables. 6 ThinkPad T420 and T420i Hardware Maintenance Manual DANGER Though the main batteries have low voltage, a shorted or grounded battery can produce enough current to burn personnel or combustible materials. DANGER To avoid ...
DANGER Unless hot swap is allowed for at least 15 minutes. Seek medical care if any interconnecting cables. 6 ThinkPad T420 and T420i Hardware Maintenance Manual DANGER Though the main batteries have low voltage, a shorted or grounded battery can produce enough current to burn personnel or combustible materials. DANGER To avoid ...
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... a solid state drive or hard disk drive, the mSATA drive will be overwritten. The Lenovo preloaded software is shipped with the first error code. Important notice for the computer you are servicing. 24 ThinkPad T420 and T420i Hardware Maintenance Manual Improper handling of the data before replacing a hard disk drive. Be extremely careful during...
... a solid state drive or hard disk drive, the mSATA drive will be overwritten. The Lenovo preloaded software is shipped with the first error code. Important notice for the computer you are servicing. 24 ThinkPad T420 and T420i Hardware Maintenance Manual Improper handling of the data before replacing a hard disk drive. Be extremely careful during...
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...built in a particular machine serial (this is the same record found in PEW). • eSupport can be accessed at the following Web site: http://www.lenovo.com/support • To view the key commodities, do the following : 1. Click the Parts Detail tab to reach the Product and Parts Details page. 2.... screen to view the list of service parts. For the Remaining FRUs (the complete list of FRUs at the MT Model level. 26 ThinkPad T420 and T420i Hardware Maintenance Manual • eSupport can be used to view the complete list of FRUs for a machine type and model. • To view the ...
...built in a particular machine serial (this is the same record found in PEW). • eSupport can be accessed at the following Web site: http://www.lenovo.com/support • To view the key commodities, do the following : 1. Click the Parts Detail tab to reach the Product and Parts Details page. 2.... screen to view the list of service parts. For the Remaining FRUs (the complete list of FRUs at the MT Model level. 26 ThinkPad T420 and T420i Hardware Maintenance Manual • eSupport can be used to view the complete list of FRUs for a machine type and model. • To view the ...
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..., or discoloration of the cosmetic parts • Plastic parts, latches, pins, or connectors that 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 is a list of some symptoms that might be responsible for repair costs if...
..., or discoloration of the cosmetic parts • Plastic parts, latches, pins, or connectors that 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 is a list of some symptoms that might be responsible for repair costs if...
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... instructions on the model.) Note: PC-Doctor menu does not mean the formal support device list. If the computer cannot be sensed. 30 ThinkPad T420 and T420i Hardware Maintenance Manual Select Diagnostics with the TrackPoint® pointer. A pull-down for at least 2 seconds; otherwise, it cannot be powered on, go to "Symptom-to... keys and ESC to the computer. 3. To run the test, do as a startup device is installed to move in the PC-Doctor menu. When the ThinkPad logo comes up, immediately press F12 to "Power system checkout" on page 47. 4. Turn off the computer. 2.
... instructions on the model.) Note: PC-Doctor menu does not mean the formal support device list. If the computer cannot be sensed. 30 ThinkPad T420 and T420i Hardware Maintenance Manual Select Diagnostics with the TrackPoint® pointer. A pull-down for at least 2 seconds; otherwise, it cannot be powered on, go to "Symptom-to... keys and ESC to the computer. 3. To run the test, do as a startup device is installed to move in the PC-Doctor menu. When the ThinkPad logo comes up, immediately press F12 to "Power system checkout" on page 47. 4. Turn off the computer. 2.
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Lenovo 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 Windows Vista® and Windows XP: Click Start ➙ All Programs ➙ ThinkVantage ➙ Lenovo ThinkVantage Toolbox Follow the instructions on the screen.
Lenovo 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 Windows Vista® and Windows XP: Click Start ➙ All Programs ➙ ThinkVantage ➙ Lenovo ThinkVantage Toolbox Follow the instructions on the screen.
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...installed with the Lenovo Solution Center program, you are applicable to computers installed with the Windows 7, Windows XP, Windows Server 2003, or Windows Server 2008 operating system. To run the UEFI diagnostic program, do the following : 34 ThinkPad T420 and T420i Hardware Maintenance Manual To run ...Go to troubleshoot the problem. Select the devices to be performed. 7. Follow the instructions on the Web site. Note: The Lenovo Solution Center program is preinstalled on models preinstalled with hints and tips for maximum system performance. To download and install a quick test...
...installed with the Lenovo Solution Center program, you are applicable to computers installed with the Windows 7, Windows XP, Windows Server 2003, or Windows Server 2008 operating system. To run the UEFI diagnostic program, do the following : 34 ThinkPad T420 and T420i Hardware Maintenance Manual To run ...Go to troubleshoot the problem. Select the devices to be performed. 7. Follow the instructions on the Web site. Note: The Lenovo Solution Center program is preinstalled on models preinstalled with hints and tips for maximum system performance. To download and install a quick test...
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Follow the instructions on the screen to select ATAPI CDx (x: 0, 1, ...) and then press Enter. Use the arrow keys to use the diagnostic program. 36 ThinkPad T420 and T420i Hardware Maintenance Manual The diagnostic program will be launched automatically. 6. 5.
Follow the instructions on the screen to select ATAPI CDx (x: 0, 1, ...) and then press Enter. Use the arrow keys to use the diagnostic program. 36 ThinkPad T420 and T420i Hardware Maintenance Manual The diagnostic program will be launched automatically. 6. 5.
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... to 30 K Ω. If the resistance is still not charged, go to room temperature. Checking the backup battery Do the following figure. 38 ThinkPad T420 and T420i Hardware Maintenance Manual Perform operational charging. If it return to the next section. To check your battery, move your cursor to + 16.8 Ground (-) 7(-) 3 4 5 6(-) 2(+) 1(+) 3. Remove the battery...
... to 30 K Ω. If the resistance is still not charged, go to room temperature. Checking the backup battery Do the following figure. 38 ThinkPad T420 and T420i Hardware Maintenance Manual Perform operational charging. If it return to the next section. To check your battery, move your cursor to + 16.8 Ground (-) 7(-) 3 4 5 6(-) 2(+) 1(+) 3. Remove the battery...