Apple III
Apple III
ManufacturerApple
Model NumberA3S2
Year1980
CategoryDesktops
LocationBonus Room Attic
StatusCollection
ConditionPartial
RarityVery Rare
Date AcquiredNov 16, 2024
Last Powered OnNov 17, 2024
About this Device

Troubleshooting story: https://68kmla.org/bb/index.php?threads/apple-iii-shows-garbage-on-screen-on-startup.48828/ JCM-1 took the logic board and found the corrupt video was caused by a bad LS283 at E11. Also had issue using his wDrive and discovered the System ROM was bad, so installed a new on. Video output is now working correctly, but now the machine's PSU will enter a short state that causes is to click rapidly after being used for a bit. Replacing with a new one from ReactiveMicro.

Specifications
CPU1.8MHz Synertek 6502A
RAM128kb
Accessories
  • Keyboard
  • Monitor
  • Power Supply
Maintenance History
  • PSU Recap — Dec 2, 2024
External Links
Photos (22)
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Photo 16 Photo 17
ICs ordered to test
Photo 18 Photo 19
Current state of debugging
Photo 20
Photo 21 Photo 22