Editing Acorn Archimedes A3010 Troubleshooting Guide (section)

== Common fault catalogue ==

* '''Boots to the Supervisor <code>*</code> prompt, not the desktop''' &mdash; corrupt/cleared CMOS from a flat battery; type <code>*Desktop</code> to enter RISC OS, then replace the battery and reset CMOS.
* '''Completely dead''' — blown plug fuse or FS1, or a faulty PSU section.
* '''Slow/unreliable power-on, out-of-spec 5 V''' — ageing PSU electrolytics.
* '''Boots from Reset key but not from cold''' — power-on-reset circuit or marginal PSU.
* '''Crackle / intermittent sound''' — audio hybrid card (pins or SMD electrolytics).
* '''No RGB but machine boots''' — monitor-type mismatch; reset CMOS and reconfigure.
* '''No TV picture, RGB works''' — UHF modulator.
* '''RAM control-line failure (0x20000)''' — broken RAM control track from battery leakage.
* '''Clock/config lost''' — flat or leaked NiCd cell.
* '''Corrupt display / crashes''' — DRAM; run the memory test.
* '''No combination of CPU/memory/video works''' — the ARM250 itself; whole-device replacement.