Acer AcerAltos 21000 System Manual page 41

2. Pull open the front door.
Removing the Front Panel Door
The doors are attached to the main housing by screwless hinges.
Follow these steps to remove the door:
1. Unlock the door with the key (when necessary).
2. Open it to more than a 45 angle.
3. Lift it up a little, then move it away from the housing.
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