See this topic to learn how to install the top cover and the fan cover.
- Align the top cover with the guiding slots on both sides of the chassis, and slide it forward slightly.
Figure 1. Installing the top cover![](se450-010-350.png)
- Align the fan cover with the guiding slots on both sides of the chassis, and slide it backwards slightly to secure it.
Figure 2. Installing the fan cover (300mm)![](se450-116-370.png)
Figure 3. Installing the fan cover (360mm)![](se450-117-400.png)
- Lock the top cover with the key, and store the key to the key holder on the top cover for future use.
Figure 4. Locking the top cover![](lock_cover.png)
After this task is completed
Proceed to complete the parts replacement (see Complete the parts replacement).
Watch the procedure on YouTube