Remove The Thermal Pad; Remove The I/O Board With Cable; Remove The Wlan Card - Lenovo Chromebook C340 Hardware Maintenance Manual

Step 2. Carefully remove the speakers.
Figure 16. Remove the speakers
Go to
https://support.lenovo.com/partslookup
replacement parts:
Speakers

Remove the thermal pad

Make sure the following FRU (or CRU) have been removed.
"Remove the lower case" on page 28
"Remove the battery pack" on page 29
"Remove the I/O board with cable" on page 31
"Remove the WLAN card" on page 32
"Remove the system board" on page 33
Step 1. Carefully remove the thermal pad.
36
Lenovo Chromebook C340 and S340 Hardware Maintenance Manual
to look up the Lenovo part numbers of the following