Replace a CRU . . . . . . . . . . . . . . . 42
Computer cover . . . . . . . . . . . . . 42
Optical drive . . . . . . . . . . . . . . 43
Front bezel . . . . . . . . . . . . . . . 46
Primary storage drives . . . . . . . . . . 47
3.5-inch primary storage drive cage . . . . . 55
M.2 solid-state drive and heat sink . . . . . 56
M.2 solid-state drive bracket . . . . . . . . 62
Optical drive cage . . . . . . . . . . . . 63
Secondary storage drive . . . . . . . . . 65
PCI-Express card . . . . . . . . . . . . 67
PCI-Express connector cable . . . . . . . 68
Graphics card and plastic holder . . . . . . 70
Chassis beam. . . . . . . . . . . . . . 71
Memory module . . . . . . . . . . . . . 73
Coin-cell battery. . . . . . . . . . . . . 75
Power supply assembly . . . . . . . . . . 76
E-lock . . . . . . . . . . . . . . . . . 78
Chapter 8. Help and support . . . . . 81
Self-help resources . . . . . . . . . . . . . 81
Call Lenovo . . . . . . . . . . . . . . . . 82
Before you contact Lenovo . . . . . . . . 82
Lenovo Customer Support Center . . . . . . 82
Purchase additional services. . . . . . . . . . 83
Appendix A. Important safety
information . . . . . . . . . . . . . . . 85
Appendix B. Accessibility and
ergonomic information . . . . . . . . 99
Appendix C. Supplemental
information about the Ubuntu operating
system . . . . . . . . . . . . . . . . . 103
Appendix D. Compliance and TCO
Certified information . . . . . . . . . . 105
Appendix E. Notices and
trademarks . . . . . . . . . . . . . . . 117
ii M90t User Guide