Editing Apple Hard Disk 20 Maintenance (section)

=== Procedure ===
# [[File:HD20 Inside.jpg|thumb|Apple Hard Disk 20 with the lid removed]]'''Cover.''' Turn the unit upside down and remove the single Torx screw from the case bottom. Use a jeweller's screwdriver to '''release''' the tabs that hold the cover. Apple's caution is explicit: '''"Do not use a screwdriver to separate the case."''' Separate it with a Macintosh pull-apart tool or a plastic case opener.<ref name="hd20ss" />
# '''Controller board.''' Remove the grounding screw. Disconnect four cables - power supply, hard disk, fan and interface. Remove the four mounting screws and lift the board out.<ref name="hd20ss" />
# '''Bottom shield.''' Remove the two retaining screws. The shield lifts out with the power supply, hard drive and fan still attached to it.<ref name="hd20ss" />
# '''Fan.''' Two mounting screws. On reassembly, '''the air flow arrow points to the rear of the case and the rotation arrow points down.'''<ref name="hd20ss" />
# '''Power supply.''' Three mounting screws.<ref name="hd20ss" />
# '''Hard drive.''' Disconnect the drive cable, remove the four mounting screws and lift the drive out.<ref name="hd20ss" />