Lenovo THINKCENTRE 6019 - Manual (Page 103)

Replacing the system board
Important
The heat sink and microprocessor might be very hot. Make sure these
components are cool enough to safely handle before continuing this
procedure.
Note: When replacing the system board you must also order a new retention
module for the new system board or remove the retention module from the
failing system board and install it on the new system board.
This procedure describes how to remove and replace the system board.
1. Open the computer cover. See “Opening the cover” on page 88.
2. Pivot the drive-bay assembly upward to gain access to the heat sink.
3. Remove the hard disk drive and disconnect it from the system board. See
“Replacing the hard disk drive” on page 104.
4. Remove any PCI adapters installed. See “Replacing an adapter card” on page
90.
5. Disconnect all cables connected to the system board. See “System board
connectors” on page 87.
6. Pull up on the blue strap at the front of the system board to release it from
the chassis.
Chapter 8. Replacing FRUs - Desktop computers 97