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About this manual This manual contains service and reference information for the following ThinkPad® Notebook products. ThinkPad L412 MT 0530, 0553, 0585, 0591, 4403, and 4404 ThinkPad L512 MT 2550, 2597, 2598, 2599, 4444, and 4447 Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service technicians who are familiar with ThinkPad Notebook products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkPad Notebook product, be sure to read all the information under Safety information and Important service information. Contents About this manual ... iii Chapter 1. Safety information ... 1 General safety ... 1 Electrical safety ... 2 Safety inspection guide ... 3 Handling devices that are sensitive to electrostatic discharge ... 3 Grounding requirements ... 4 Safety notices (multilingual translations) ... 4 Laser compliance statement (multilingual translations) ... 17 Chapter 2. Important service information ... 23 Strategy for replacing FRUs ... 24 Important notice for replacing a system board ... 24 How to use error message ... 24 Strategy for replacing FRUs for CTO, CMV, and GAV ... 24 Product definition ... 24 FRU identification for CTO, CMV, and GAV products ... 25 Chapter 3. General checkout ... 27 What to do first ... 27 Checkout guide ... 28 System supporting the Lenovo ThinkVantage Toolbox program and the PC-Doctor for DOS diagnostics program ... 28 System supporting the Lenovo diagnostics programs ... 33 Power system checkout ... 35 Checking the ac adapter ... 35 Checking operational charging ... 36 Checking the battery pack ... 36 Checking the backup battery ... 37 Chapter 4. Related service information ... 39 Restoring the factory contents by using Recovery Disc Set ... 39 Passwords ... 40 Power-on password ... 40 Hard-disk password ... 40 Supervisor password ... 41 Power management ... 42 Screen blank mode ... 42 Sleep (standby) mode ... 42 Hibernation mode ... 43 Symptom-to-FRU index ... 44 Numeric error codes ... 44 Error messages ... 46 No-beep symptoms ... 46 LCD-related symptoms ... 47 Intermittent problems ... 47 Undetermined problems ... 48 Chapter 5. Status indicators ... 51 Chapter 7. FRU replacement notices ... 55 Screw notices ... 55 Retaining serial numbers ... 56 Restoring the serial number of the system unit ... 56 Retaining the UUID ... 57 Chapter 8. Removing and replacing a FRU ... 59 1010 Battery pack ... 59 1020 ExpressCard blank bezel and Media Card blank bezel ... 61 1030 Optical drive or travel cover ... 62 1040 Thermal cover ... 63 1050 Hard disk drive (HDD) assembly ... 64 1060 DIMM ... 65 1070 Fan assembly ... 66 1080 CPU ... 69 1090 SIM slot cover ... 70 1100 Wireless WAN slot cover and PCI Express Mini Card for wireless WAN ... 72 1110 Palm rest assembly with cables ... 74 1120 PCI Express Mini Card for wireless LAN . . 76 1130 Backup battery ... 78 1140 Bluetooth daughter card (BDC-2) ... 78 1150 Media Card Reader slot board and Media Card Reader cable assembly ... 79 1160 Keyboard ... 81 1170 Keyboard bezel ... 83 1180 LCD unit ... 85 1190 Top shielding assembly ... 89 1200 System board assembly ... 91 1210 USB connector board and USB cable assembly ... 96 1220 DC-in cable and base cover ... 98 2010 LCD front bezel ... 102 2020 Speaker assembly ... 103 2030 Integrated camera ... 104 2040 Antenna assembly ... 104 2050 Hinges, LCD panel, LCD cable, and LCD rear cover assembly ... 106 Chapter 9. Locations ... 111 Front view ... 112 Rear view ... 113 Bottom view ... 113 Chapter 10. Parts list ... 115 Overall ... 116 LCD FRUs ... 138 Keyboard ... 144 Miscellaneous parts ... 145 ac power adapters ... 146 Power cords ... 147 Recovery discs ... 149 Windows 7 Home Basic (32 bit) DVDs ... 150 Windows 7 Home Premium (32 bit) DVDs . . 151 Windows 7 Home Premium (64 bit) DVDs . . 151 Windows 7 Professional (32 bit) DVDs ... 152 Windows 7 Professional (64 bit) DVDs ... 153 Windows Starter (32 bit) DVDs ... 154 Windows 7 Ultimate (32 bit) DVDs ... 155 Windows 7 Ultimate (64 bit) DVDs ... 155 Common service tools ... 156 Appendix A. Notices ... 157 Electronic emissions notices ... 158 Trademarks ... 158