■Closing the Casing
Place the top cover on the casing base (1) so that the distance (a) is approximately 2 cm. Ensure that the top cover of the casing engages in the guide rails in the lower part of the casing.
Push the top cover in the direction of the arrow (2) until it engages.
a 
Turn the key downward if necessary to lock the casing again.
Return the PC to its original position.
Reconnect the cables.
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