Use A Golden Key U1 Tool To Flash-Write Key Id Information; Remove The Antennas - Lenovo Legion Slim 5 Hardware Maintenance Manual

Screw specifications
M2.5 × L3.2
M2.0 × L4.0
Step 3. Disconnect the USB board cable from the system board. Then, remove the USB board cable.
Figure 23. Remove the USB board cable
Go to https://support.lenovo.com/partslookup
replacement parts:
System board
USB board cable

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 antennas

Make sure the following FRUs (CRUs) have been removed.
"Remove the lower case" on page 28
"Remove the DC-in bracket" on page 29
"Remove the charge pad" on page 30
"Remove the Wi-Fi card" on page 31
"Remove the left SSD (2242 or 2280)" on page 32
"Remove the right SSD (2242 or 2280)" on page 34
Number of screws
2
4
to look up the Lenovo part numbers of the following
for detailed instructions on how to create
.
Chapter 4 Removing a FRU or CRU
43