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Question posted by Bernne on May 9th, 2014

T420 Shows 2 Monitors When Only One Exists

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Related Lenovo ThinkPad T420 Manual Pages

(English) Power Manager Deployment Guide - Page 47

Table 6. Time policy setting • Set monitor brightness - ThinkPad LCD Brightness policy setting - External monitor brightness policy setting (Windows Vista/7 only) - Time policy setting...byte characters or 16 double-byte characters. 2. If the power plan (scheme) name does not exist on page 39. time policy setting Specifies the period of inactivity before your computer will enter ...

ThinkPad Gobi Mobile Broadband Wireless WAN (L420, L421, L520, T420s, T420si, T430s, T430si) - Page 2

ThinkPad® Mobile Broadband (T420s, T420si, T430s, and T430si) 1 2 3 4 5 AUX(Blue) 7 6 MAIN(Red) 8 http://www.lenovo.com/support/wireless © Lenovo 2012. ThinkPad is a registered trademark of Lenovo. 0 A3 3 6 2 6

ThinkPad Gobi Mobile Broadband Wireless WAN (T420, T420i, T430, T430i, T520, T520i, T530, T530i, W520, W530) - Page 1

ThinkPad® Mobile Broadband (T420, T420i, T430, and T430i) 1 2 3 4 5 6 MAIN(Red) AUX(Blue) 7 8 http://www.lenovo.com/support/wireless

(English) BIOS Setup using Windows Management Instrumentation Deployment Guide - Page 10

... Common interface for different products Supported computers BIOS setup through WMI is supported on the following ThinkPad products only: • R400, R500, T400, T500, W500, X200, X200s, X200 ...8226; W700, W700ds, W701 • T400s • X201, X201s, T410, T410s, T510, W510 • T420, T420i, T420s, T420si, T520, T520i, W520, X220, X220i, X220 Tablet, X220i Tablet • X1 • T430,...

Hardware Maintenance Manual - Page 1

ThinkPad T420 and T420i Hardware Maintenance Manual

Hardware Maintenance Manual - Page 3

..., and Bluethooth daughter card 87 1130 SmartCard 92 1140 Modem daughter card (MDC 94 © Copyright Lenovo 2012 i 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

... about ac power adapters 164 Power cords 165 Recovery discs 166 Common service tools 173 Appendix A. Notices 175 Electronic emissions notices 176 Trademarks 177 ii ThinkPad T420 and T420i Hardware Maintenance Manual 1150 Speaker assembly 95 1160 LCD unit 97 1170 Fan assembly 101 1180 CPU 105 1190 Base cover assembly and...

Hardware Maintenance Manual - Page 5

... 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. Important: This manual is intended only for the following ThinkPad® products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual...

Hardware Maintenance Manual - Page 6

iv ThinkPad T420 and T420i Hardware Maintenance Manual

Hardware Maintenance Manual - Page 8

... the approved probe leads and accessories for safe operational condition. • Do not use this type of the units. • If an electrical accident occurs: 2 ThinkPad T420 and T420i Hardware Maintenance Manual such touching can cause personal injury and machine damage. • Do not service the following parts with powered-on a machine...

Hardware Maintenance Manual - Page 10

... the parts in protective packages until they exceed the requirements noted here. 2. When working on ac-operated computers. You can be verified by a certified electrician. 4 ThinkPad T420 and T420i Hardware Maintenance Manual Make sure that the ESD protective devices you are inserted into the product. • Avoid contact with other people. •...

Hardware Maintenance Manual - Page 12

... batteries have low voltage, a shorted or grounded battery can produce enough current to burn personnel or combustible materials. Seek medical care if any interconnecting cables. 6 ThinkPad T420 and T420i Hardware Maintenance Manual DANGER Unless hot swap is allowed for at least 15 minutes. DANGER To avoid shock, do as follows before removing...

Hardware Maintenance Manual - Page 34

... use of an optical drive • Diskette drive damage caused by pressure on laptop products The following information in the parts exchange form or parts return form that have been subjected to excessive force, or dropped. 28 ThinkPad T420 and T420i Hardware Maintenance Manual Procedure index and page number in the drive, or...

Hardware Maintenance Manual - Page 44

...is not correct, replace the battery pack. Checking the backup battery Do the following figure. 38 ThinkPad T420 and T420i Hardware Maintenance Manual See the following : 1. This protects the battery pack from being ...Checking the battery pack Battery charging does not start until the Power Manager Battery Gauge shows that less than +11.0 V dc, the battery pack has been discharged. ...

Hardware Maintenance Manual - Page 58

...replace the following FRUs one at the time of the following : 1. LCD assembly 52 ThinkPad T420 and T420i Hardware Maintenance Manual When analyzing an intermittent problem, do not replace a nondefective ... such as cosmic radiation, electrostatic discharge, or software errors. If no more errors exist. Undetermined problems If the diagnostic tests did not identify the adapter or device that ...

Hardware Maintenance Manual - Page 64

... the screen for less than four seconds. Enable the Full Screen Magnifier function. 58 ThinkPad T420 and T420i Hardware Maintenance Manual Fn key combinations (continued) Key combination Description Note: To switch between the computer display and an external monitor. Fn+PgUp Fn+Home Notes: To use the Power Manager. Though the screen fades...

Hardware Maintenance Manual - Page 118

... test is dropped, test it only on a horizontal surface. 2. Note: If the test shows that HDD Active Protection System is as an ESD mat or a corrugated conductive surface. If ... DC-in connector cable" on page 106 Important notices for the HDD Active Protection System 112 ThinkPad T420 and T420i Hardware Maintenance Manual Note: Dropping a system board from a height of G-forces. When...

(English) User Guide - Page 25

ThinkPad T420/T420i left-side view 1 Fan louvers (left) 3 Ethernet connector 5 USB connector (left) 2 Monitor connector 4 DisplayPort connector 6 Smart card slot 1 Fan louvers (left) The internal fan and louvers enable air to the instructions in the computer and cool the central processor. For details, refer to circulate in "Attaching an external monitor" on the computer...

(English) User Guide - Page 26

..., external monitor, or HDTV to the instructions in "Access Connections" on page 79. For details, refer to your computer connects to the lower right and left of the connector, show the status...For details, refer to the instructions in "Using the media card reader" on page 20. ThinkPad T420/T420i bottom view 8 User Guide Bottom view Figure 4. Note: Your computer is compatible with USB...

(Arabic) User Guide - Page 176

Windows Update C:\SWTOOLS\DRIVERS\MONITOR TPLCD.INF ThinkPad ThinkPad Monitor INF TPFLX.ICM TPLCD.ICM ‫‪ThinkPad Setup‬‬ ThinkPad Setup ThinkPad Setup F1 ThinkPad Setup‬‬ ThinkPad Setup ThinkPad Setup Enter ThinkPad Setup‬‬