Contents
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. General checkout . . . . . 21
What to do first . . . . . . . . . . . . . . . 21
Checking the ac power adapter . . . . . . . . 22
Checking the battery and operational charging . . 22
Lenovo 300e 2nd Gen CRU list . . . . . . . . . 23
Chapter 3. Locating computer
controls, connectors, and
indicators . . . . . . . . . . . . . . . 25
Front . . . . . . . . . . . . . . . . . . . 25
Base . . . . . . . . . . . . . . . . . . . 26
Left . . . . . . . . . . . . . . . . . . . 27
Right . . . . . . . . . . . . . . . . . . . 28
Bottom . . . . . . . . . . . . . . . . . . 29
Chapter 4. Identifying FRUs
(CRUs) . . . . . . . . . . . . . . . . . 31
All FRUs (CRUs) for Lenovo 300e 2nd Gen . . . . 31
Chapter 5. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 35
General guidelines. . . . . . . . . . . . . . 35
Remove Lenovo Integrated Pen . . . . . . . . 35
Remove the lower case . . . . . . . . . . . . 36
Remove the battery pack . . . . . . . . . . . 37
Remove the wireless module. . . . . . . . . . 38
Remove the M.2 solid-state drive . . . . . . . . 39
Remove the pen board . . . . . . . . . . . . 40
Remove the speakers . . . . . . . . . . . . 41
Remove the RTC battery . . . . . . . . . . . 42
Remove the power board . . . . . . . . . . . 43
Remove the system board. . . . . . . . . . . 44
Remove the World-Facing camera (for selected
models) . . . . . . . . . . . . . . . . . . 45
Remove the upper case (with keyboard) . . . . . 46
Disassemble the LCD module . . . . . . . . . 48
Remove the LCD panel . . . . . . . . . . 48
Remove the front camera and the LCD
cable . . . . . . . . . . . . . . . . . 50
Remove the hinges. . . . . . . . . . . . 52
Trademarks . . . . . . . . . . . . . . . . . lv
© Copyright Lenovo 2020
i
First Edition (January 2020)
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.
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