This file contains the Hardware Maintenance Manual (HMM), September 2012 Edition.

This HMM contains information regarding hardware installation and removal; diagnostics and troubleshooting; hardware interfaces; and service (FRU) part numbers.

Supported ThinkPad systems:

• T420 and T420i

Released on 7 September 2012

Note:

• The Recovery DVD (RDVD) information found in Hardware Maintenance Manual (HMM) is not updated as regularly as the RDVD service part document.
• For the latest RDVD part numbers, please refer to your systems' RDVD service part document instead.

Having trouble downloading a PDF file?

For links to updated service parts information, visit the service parts list index.

To view PDF files you must have the latest version of Adobe Acrobat installed on your system.