Lenovo Yoga AIO 9 Hardware Maintenance Manual page 65

7. Remove three screws and then remove the I/O board bracket.
Heat sink
Prerequisite
Before you start, read Chapter 1 "Important safety information" on page 1 and print the following
instructions.
Removal steps
1. Remove the base module. See "Base module" on page 54.
2. Remove the bottom rubber foot (left, right and middle). See "Bottom rubber foot (left, right and middle)"
on page 55.
3. Remove the bottom cover. See "Bottom cover" on page 57.
4. Remove the middle bracket. See "Middle bracket" on page 57.
5. Remove the stand base bracket. See "Stand base bracket" on page 58.
6. Remove the stand. See "Stand" on page 58.
7. Remove seven screws and then remove the heat sink.
.
Chapter 6 Hardware removal and installation
61