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Macintosh SE/30 Troubleshooting
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=== !Reset Line === Several chips can be held in reset or control the reset of other chips. Although the video output circuit works regardless of the state of the reset line (so you can see the horizontal lines/simasimac) the system won't do anything useful until out of reset. The reset line connects to: * In/Out 68030 ('''UK8''') !RESET * VIA1 ('''UK12''') pin 37 * VIA2 ('''UK11''') pin 37 * Apple Desktop Bus ADB Chip ('''UL11''') pin 4 (for keyboard/mouse) * Super Woz Integrated Machine SWIM ('''UJ11''') pin 25 (for floppy drive) * 53C80 SCSI Controller ('''UI12''') pin 7 (for HDD) * ASC stereo sound chip ('''UE10''') pin 40 * Sony Sound Chip ('''UB11''') pin 5 Any or all of these chips can cause the !RESET To not go high even if they are inputs as if they go faulty it could pull the pin lower.
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