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on development-level systems and there is no guarantee that these measurements will be the same on
generally available systems. Furthermore, some measurements may have been estimated through
extrapolation. Actual results may vary. Users of this document should verify the applicable data for their
specific environment.
This document is copyrighted by Lenovo and is not covered by any open source license, including any Linux
agreement(s) which may accompany software included with this product. Lenovo may update this document
at any time without notice.
For the latest information or any questions or comments, contact or visit the Lenovo Web site:
https://pcsupport.lenovo.com
Trademarks
Lenovo, Lenovo logo, ThinkCentre, and ThinkCentre logo are trademarks of Lenovo. Intel, Intel SpeedStep,
Optane, and Thunderbolt are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other
countries. Microsoft, Windows, Direct3D, BitLocker, and Cortana are trademarks of the Microsoft group of
companies. Mini DisplayPort (mDP), DisplayPort, and VESA are trademarks of the Video Electronics
Standards Association. The terms HDMI and HDMI High-Definition Multimedia Interface are trademarks or
registered trademarks of HDMI Licensing LLC in the United States and other countries. Wi-Fi, Wi-Fi Alliance,
WiGig, and Miracast are registered trademarks of Wi-Fi Alliance. USB-C is a registered trademark of USB
Implementers Forum. All other trademarks are the property of their respective owners.
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M90a Pro Gen4 Hardware Maintenance Manual
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