Editing Acorn Archimedes A4000 (section)

== Case and power ==

The A4000 is a slimline three-box desktop: system unit, separate keyboard and monitor. The case has two 3.5-inch drive bays, one of them accessible from the front for the floppy drive.<ref name="arcwiki" /> Unlike the A3010 and A3020, whose power supply is built onto the main board, the A4000 has a '''separate cased mains power-supply module''' that Acorn treats as a replaceable service part.<ref name="sm">[[Acorn A3010, A3020 and A4000 Service Manual]], Acorn Computers Ltd — hosted on this wiki.</ref> The machine is unusually simple to open: two screws release the cover, after which the board and drives lift out.<ref name="chris" />