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17:48, 29 March 2025 Josh talk contribs created page Macintosh SE/30 Troubleshooting (Created page with "=== Preliminary Checks and Power Supply Basics === Begin troubleshooting by confirming the analog board provides correct voltages: ideally, +5 V DC (within 4.90–5.10 V) and +12 V DC at drive connectors. If the SE/30 appears completely dead (no fan, CRT glow, or startup chime), inspect analog power components, including fuses, rectifiers CR2 and CR3, transistor Q2, and resistor R22. Verify no external peripherals or expansion cards are causing boot issues. Ensure reset...")