Lenovo ThinkCentre A61 Hardware Maintenance Manual page 126

To access the system board components and drives:
1. Remove the computer cover. See "Removing the computer cover" on page 117.
2. Remove the front bezel by releasing the three tabs and pivoting the bezel
Figure 1. Removing the bezel
3. In some models, you might have to remove the PCI adapter card in order to
Figure 2. Removing the PCI adapter card
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Hardware Maintenance Manual
forward to remove completely.
gain access to the battery.