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Acorn Archimedes A4000 Troubleshooting Guide
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== Common fault catalogue == * '''Completely dead''' — blown plug fuse or FS1, or a faulty PSU; check fuses, then exchange the PSU. * '''Random resets / cuts out when warm''' — PSU thermal shutdown or failing PSU; check ventilation, exchange the PSU. * '''Boots but no video''' — monitor/cable or the VIDC section of the ARM250; run the video test. * '''Corrupt display / crashes''' — DRAM; run the memory test. * '''No hard disc''' — IDE cable, drive power, or a dead/stiction Conner drive. * '''Lost time/config''' — flat or leaked CMOS battery (see the maintenance guide). * '''No combination of CPU/memory/video works''' — the ARM250 itself; whole-device replacement.
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