Restore system files and settings to an earlier
point . . . . . . . . . . . . . . . . . 44
Restore your files from a backup . . . . . . 44
Reset your computer . . . . . . . . . . . 44
Use advanced options . . . . . . . . . . 45
Windows automatic recovery. . . . . . . . 45
Create and use a recovery USB device . . . . 45
Update the device driver . . . . . . . . . 46
Chapter 7. CRU replacement . . . . . 47
What are CRUs . . . . . . . . . . . . . . . 47
Replace a CRU . . . . . . . . . . . . . . . 48
Computer stand . . . . . . . . . . . . . 48
Rear cover . . . . . . . . . . . . . . . 52
Optical drive . . . . . . . . . . . . . . 53
Optical drive holder . . . . . . . . . . . 56
System board shield . . . . . . . . . . . 58
VESA mount bracket cover . . . . . . . . 61
VESA mount bracket . . . . . . . . . . . 63
Storage drive and storage drive bracket . . . 65
M.2 solid-state drive . . . . . . . . . . . 70
Memory module . . . . . . . . . . . . . 74
Chapter 8. Help and support . . . . . 79
Self-help resources . . . . . . . . . . . . . 79
Call Lenovo . . . . . . . . . . . . . . . . 80
Before you contact Lenovo . . . . . . . . 80
Lenovo Customer Support Center . . . . . . 80
Purchase additional services. . . . . . . . . . 81
Appendix A. Important safety
information . . . . . . . . . . . . . . . 83
Appendix B. Accessibility and
ergonomic information . . . . . . . . 97
Appendix C. Supplemental
information about the Ubuntu operating
system . . . . . . . . . . . . . . . . . 101
Appendix D. Compliance
information . . . . . . . . . . . . . . . 103
Appendix E. Notices and
trademarks . . . . . . . . . . . . . . . 113
ii M70a and M90a User Guide
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