HP Elite x2 1013 G3 Maintenance And Service Manual page 62

12. A BIOS board is connected to the system board as shown in the following image. DO NOT remove this
board when removing the system board.
Reverse this procedure to replace the system board.
IMPORTANT:
See Heat sink on page 56
54 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
When installing a new system board, the thermal grease and thermal pads must be replaced.
for more information.