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Home Forums 68kMLA Newton Keyboard (and a picture) — #11
Post #11 by John8520
Source Forum68kMLA
CategoryPeripherals
Post DateWed, 30 Apr 2008 - 18:18
Original URLhttps://68kmla.org/bb/threads/newton-keyboard-and-a-picture.13006/
Post
This is also why the ADB ports on Macs are thermally fused, if the wire drops out while the machine is running it can short and it was known to kill the port on the first ADB Macs (yes, Mac II owners beware!). Apple subsequently fitted a thermal fuse to the power circuit on the ADB ports to prevent this happening. I've had Macs lose the ADB port for a few minutes.
That's happened to my Mac II before! I remember troubleshooting for days before hearing about the fuse, soldering a new one in fixed the problem instantly.

mp.ls