Use A Golden Key U1 Tool To Flash-Write Key Id Information - Lenovo ThinkBook 13s Gen 4 Hardware Maintenance Manual

Figure 31. Remove the system board with the I/O board cable
Screw specifications
M2 x L4
Step 4. Disconnect the I/O board cable (30 pin) and the I/O board cable (40 pin) from the system board.
Figure 32. Remove the I/O board cables
Go to
https://support.lenovo.com/partslookup
replacement parts:
System board
I/O board cable (30 pin)
I/O board cable (40 pin)

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.
44
Hardware Maintenance Manual
Number of screws
2
to look up the Lenovo part numbers of the following
for detailed instructions on how to create