Editing Atari Mega STE Troubleshooting (section)

== Preliminary Checks ==

Before disassembly:

# '''Mains lead and fuse''' — check continuity from plug to IEC connector.
# '''PSU power switch''' — verify continuity in the ON position with the machine unplugged.
# '''Keyboard cable''' — the Mega STE uses a coiled cable with DIN connectors (not RJ12 like the Mega ST). Verify all pins are intact.
# '''CPU speed switch''' — the Mega STE has a software-switchable 8/16 MHz CPU clock. Some old software only runs at 8 MHz; boot issues may be speed-related.
# '''RAM configuration''' — the Mega STE uses 30-pin SIMMs (1 MB, 2 MB, or 4 MB configurations). Mismatched or faulty SIMMs will prevent boot.