Dell OptiPlex 270 Service Manual page 8

2. Replace the computer cover. Ensure that the two metal hooks and tabs are securely in position.
To help replace the computer cover, remove the accent door and front mask from the computer cover:
a. Remove the front mask by releasing the tabs on the inside of the computer cover.
b. Remove the accent door by pressing the middle of the door while you lift away the sides of the door.
1 accent door
2 front mask
3. Replace the computer cover and ensure that the two metal hooks and tabs are securely in position.
1 metal hooks (2)
4. To replace the front mask and accent door, press them into position.
Small Desktop Computer