Remove the trans board
Make sure the following FRU (or CRU) have been removed.
"Remove the active pen" on page 28
"Remove the lower case" on page 29
"Remove the battery pack" on page 30
"Remove the upper case" on page 47
"Remove the LCD panel" on page 48
"Remove the hinge and soundbar module" on page 51
Step 1.
Disconnect the cables.
Figure 43. Disconnect the cables
Step 2.
Remove the trans board.
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Lenovo Yoga C940–15IRH Hardware Maintenance Manual