User ManualTable of ContentsContents5About this manual7Safety information9General safety10Electrical safety11Safety inspection guide13Handling devices that are sensitive to electrostatic discharge14Grounding requirements14Safety notices: multilingual translations15Laser compliance statement22Important service information25Strategy for replacing FRUs25Strategy for replacing a hard disk drive26Important notice for replacing a system board26How to use error message26Strategy for replacing FRUs for CTO, CMV, and GAV27Product definition27FRU identification for CTO, CMV, and GAV products27Important information about replacing RoHS compliant FRUs29General checkout31What to do first32Checkout guide33Diagnostics using PC-Doctor for DOS34Creating the PC-Doctor diagnostics diskette34Testing the computer34Detecting system information with PC-Doctor35PC-Doctor for Windows36Power system checkout37Checking the AC adapter37Checking operational charging37Checking the battery pack38Related service information39Restoring the factory contents by using Product Recovery discs39Passwords40Power-on password40Hard-disk password40Supervisor password41How to remove the hard-disk password41Power management42Screen blank mode42Sleep (standby) mode42Hibernation mode43Symptom-to-FRU index44Numeric error codes44Error messages46Beep symptoms47No-beep symptoms47LCD-related symptoms48Intermittent problems49Undetermined problems49Lenovo 3000 N50051Specifications51Status indicators53FRU tests55Fn key combinations56FRU replacement notices57Screw notices57Retaining serial numbers58Restoring the serial number of the system unit58Retaining the UUID58Reading or writing the ECA information60Removing and replacing a FRU611010 Battery pack621020 Dummy cards631030 Hard disk drive (HDD) slot cover and HDD641040 Optical drive661050 Thermal slot cover671060 DIMM681070 Fan assembly691080 Heat sink assembly711090 Wireless LAN card slot cover and PCI Express Mini Card for wireless LAN731100 CPU751110 Keyboard cover and power board761120 Bluetooth daughter card (BDC-2.1)781130 Keyboard791140 LCD unit811150 Keyboard bezel and LED board L841160 LED board R871170 System board and ExpressCard slot assembly881180 Speakers and base cover922010 LCD front bezel942020 Inverter card952030 Integrated camera962040 LCD panel, LCD cable, and hinges972050 Antenna assembly and LCD cover100Locations101Front view101Rear view103Bottom view103Parts list104Overall105LCD FRUs10915.4-in. WXGA TFT109Keyboard111Miscellaneous parts112AC adapters113Power cords114Recovery discs115Windows XP Professional DVDs115Windows Vista Home Basic (32 bit) DVDs116Windows Vista Home Premium (32 bit) DVDs117Windows Vista Business (32 bit) DVDs118Common service tools119Notices121Trademarks122Size: 4.11 MBPages: 124Language: EnglishOpen manual