HP TouchSmart IQ820 - Desktop PC Manual page 44

4 Replace the memory module EMI shield.
5 Replace the hard disk drive/memory cover by lowering it into place, and sliding it so the slots on the
cover fit into the grooves under the computer stand.
The cover snaps into place with a click as the side tabs engage with the grooves in the computer.
When the cover is replaced properly, it will be flush with the larger back cover.
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Upgrading and Servicing Guide