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  • 16:59, 4 April 2025 Josh talk contribs created page Macintosh SE Troubleshooting (Created page with "__NOTOC__ = Macintosh SE Troubleshooting Guide = == 🔌 Preliminary Checks and Power Supply Basics == Begin troubleshooting by confirming the analog board provides correct voltages: ideally, '''+5V''' DC (within '''4.90–5.10V''') and '''+12V''' DC at the floppy or SCSI drive connectors. If the SE appears completely dead (no fan, CRT glow, or startup chime): * Check analog board fuses, rectifiers ('''CR2''', '''CR3'''), '''Q2 transistor''', and '''R22 resistor''' *...")