Editing Acorn Archimedes A4000 Capacitor Guide (section)

== Is the A4000 a recap candidate? ==

The A4000 board is almost entirely surface-mount logic, but its '''electrolytics are conventional leaded parts plus surface-mount ceramic decouplers''' &mdash; it is '''not''' one of the Acorn machines that suffer from leaking surface-mount electrolytic capacitors. Those are the [[Acorn Archimedes A5000]], the A4 laptop and the Risc PC; the through-hole-capacitor machines such as the A3020/A4000 are generally unaffected.<ref name="stardot">[https://stardot.org.uk/forums/ Stardot forums] (Acorn restoration community). The electrolyte-leakage problem is specific to the Acorn machines fitted with SMD electrolytic capacitors (A5000, A4, Risc PC); the through-hole-capacitor machines such as the A3020/A4000 are generally fine.</ref> On the A4000 the recap priorities are therefore the '''PSU module''' and any individually aged or leaking board electrolytic, not a blanket board recap.