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About this manual This manual contains service and reference information for ThinkPad X41 Tablet (MT 1866/1867/1869) product. Use this manual along with the advanced diagnostic tests to troubleshoot problems. The manual is divided into sections as follows: v The common sections provide general information, guidelines, and safety information required in servicing computers. v The product-specific section includes service, reference, and product-specific parts information. Important This manual is intended for trained service personnel 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 review the safety information under “Safety notices: multilingual translations” on page 8, “Safety information” on page 20, and “Laser compliance statement” on page 26. Contents About this manual ... .1 Introduction ... .3 Important service information ... .3 Strategy for replacing FRUs ... .3 Strategy for replacing a Hard disk drive ... .4 Important notice for replacing a system board . . .4 How to use error messages ... .4 Strategy for replacing FRUs for CTO, CMV, and GAV 4 Product definition ... .4 FRU identification for CTO, CMV, and GAV products 5 Important information about replacing RoHS compliant FRUs ... .7 Diskette compatibility matrix ... .8 Safety notices: multilingual translations ... .8 Safety information ... .20 General safety ... .20 Electrical safety ... .21 Safety inspection guide ... .23 Handling devices that are sensitive to electrostatic discharge ... .24 Grounding requirements ... .25 Laser compliance statement ... .26 General descriptions ... .29 Read this first ... .29 What to do first ... .29 Related service information ... .31 Service Web site ... .31 Restoring the pre-installed system ... .31 Passwords ... .32 Power management ... .34 Checkout guide ... .37 Testing the computer ... .37 Detecting system information with PC-Doctor . . .40 Power system checkout ... .40 ThinkPad X41 Tablet ... .45 Product overview ... .47 Specifications ... .47 Status indicators for X41 Tablet ... .49 FRU tests ... .51 Fn key combinations ... .53 Symptom-to-FRU index ... .55 Numeric error codes ... .55 Error messages ... .63 Beep symptoms ... .65 No-beep symptoms ... .65 LCD-related symptoms ... .66 Intermittent problems ... .67 Undetermined problems ... .67 FRU replacement notices ... .68 Screw notices ... .68 Retaining serial numbers ... .69 Removing and replacing a FRU ... .72 1010 Battery pack ... .73 1020 Hinge cap ... .74 1030 Hard disk drive ... .77 1040 DIMM cover ... .79 1050 Mini PCI adapter ... .80 1060 DIMM ... .81 1070 MDC-2 ... .82 1080 BMDC-3 ... .83 1090 Keyboard ... .84 1100 Upper case ... .87 1110 Backup battery ... .90 1120 LCD assembly ... .91 1130 Hard disk housing assembly ... .94 1140 Top shielding ... .95 1150 System board ... .96 1160 Fansink ... .99 2010 LCD bezel ... .101 2020 Hinge ... .104 2030 Inverter card ... .106 2040 LCD ... .108 2050 Wireless LAN antenna cables and Bluetooth antenna cable ... .110 2060 Digitizer assembly ... .111 Locations ... .113 Front view for X41 Tablet ... .113 Rear view for X41 Tablet ... .114 Bottom view for X41 Tablet ... .115 Front View for X4 Dock ... .116 Rear View for X4 Dock ... .117 Parts list ... .118 Overall ... .118 LCD FRUs ... .125 Keyboard ... .127 Recovery CDs ... .128 Miscellaneous parts ... .129 AC adapters ... .129 Common parts list ... .130 Notices ... .133 Trademarks ... .135