Lenovo ThinkPad Edge E420s Hardware Maintenance Manual page 36

1. Click Product & Parts Detail and then follow the instructions on the screen to reach the Product
and Parts Details page.
2. Click the Parts Detail tab to view the list of service parts.
Using the HMM
For key commodities (examples - hard disk drive, system board, microprocessor, LCD, and memory)
Use the HMM as a backup to PEW and eSupport to view the complete list of FRUs at the MT model level.
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Hardware Maintenance Manual