Use A Golden Key U1 Tool To Flash-Write Key Id Information; Remove The Top Screen Lcd Module - Lenovo Yoga Book 9i Hardware Maintenance Manual

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Figure 26. Remove the I/O board FPC, the I/O board cables, and the I/O boards
Screw specifications
M1.2 x L1.4
Step 4. Lift the latch fastened on the connector of the left I/O board cable (7) and then disconnect one end
of the cable from the left I/O board (8). Repeat the step for the other end connected to the system
board.
Step 5. Remove the left I/O board cable (9) and then the left I/O board is therewith removed.
Step 6. Repeat Step 3,4,5 for the right I/O board FPC, the right I/O board cable, and the right I/O board.
Go to
https://support.lenovo.com/partslookup
parts:
System board
I/O board (L)
I/O board (R)
I/O board FPC (L)
I/O board FPC (R)
I/O board cable (L)
I/O board cable (R)
Motor cable rubber

Use a Golden Key U1 tool to flash-write key id information

After replacing the system board and re-assembling the computer, use a pre-made Golden Key U1 tool to
start the computer and flash-write the serial number (SN), machine type (MT), product name (PN), and UUID
to the new system board.
The Golden Key U1 tool is prepared by running the U1 Update software on a FAT32-formatted USB thumb
drive. Go to
http://support.lenovo.com/us/en/solutions/HT506954
and use a Golden Key U1 tool.

Remove the top screen LCD module

Make sure the following FRUs (or CRUs) have been removed.
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Hardware Maintenance Manual
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to look up the Lenovo part number of the following replacement
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Number of screws
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for detailed instructions on how to create