Lenovo ThinkCentre M720e User Manual page 66

Before you open the computer cover, turn off the computer and wait several minutes until the computer is
cool.
Replacement procedure
1. Remove the computer cover. See "Computer cover" on page 44.
2. Replace a PCI Express card.
Figure 31. Removing a PCI Express card
Note: If the card is held in place by a retaining latch, press the latch
Then, gently remove the card from the slot.
60
M720e User Guide
1
as shown to disengage the latch.