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General| Model | ThinkPad W520 4284 |
|---|---|
| Security | Fingerprint Reader, TPM |
| Camera | 720p HD Webcam |
| Processor | Intel Core i7-2720QM |
| Storage | 500 GB HDD |
| Display | 15.6" HD+ (1600x900) LED-backlit |
| Graphics | NVIDIA Quadro 1000M |
| Operating System | Windows 7 Professional |
| Battery | 6-cell Li-Ion |
| Optical Drive | DVD-RW |
| Ports | USB 2.0, USB 3.0, eSATA, DisplayPort |
| Networking | Wi-Fi, Bluetooth |
| Warranty | 1-year |
| Dimensions (W x D x H) | 373 x 245 x 37.5 mm (14.7 x 9.6 x 1.5 in) |
Follow rules to ensure general safety during maintenance and handling of equipment.
Observe safety rules when working with electrical equipment, including power cord and circuit safety.
Checklists and considerations for identifying potentially unsafe conditions before servicing.
Guidelines and strategy for replacing Field Replaceable Units (FRUs) to prevent unnecessary costs.
Using PC-Doctor for DOS and Lenovo ThinkVantage Toolbox for system diagnostics.
Table outlining applicable tests for various FRUs like system board, power, and LCD.
Procedures for checking AC adapter, battery pack, and backup battery functionality.
Procedure for restoring factory contents using Recovery Disc Sets.
Information on power-on, hard-disk, and supervisor passwords and their removal.
Index listing symptoms like error codes, beep patterns, and LCD issues with FRU actions.
Notices and procedures for tightening screws, including torque specifications.
Procedures for restoring system serial numbers and assigning Universally Unique Identifiers (UUIDs).
General rules and safety precautions to observe before servicing any computer FRU.
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