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Cicero

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  1. Cicero

    Extended Keyboard II troubleshooting

    Turns out it was a combination of the ADB cable itself being somehow bad as well as a few non functioning key switches. I finally got another AEKII and it works fine. The old AEKII works with the beer cable but has a few non responsive key switches. I’ll despiser those individually and disassemble the switches to clean them out. During the early cleaning process, the right arrow key switch actually expelled some kind of goo when depressed. I shudder to imagine what kind of precious life the keyboard had.
  2. Cicero

    Extended Keyboard II troubleshooting

    Larry Pina's books have been invaluable to me in restoring this computer. However, the problem isn't just with a select few keys. The keyboard just stops working altogether after a while. I removed all the keycaps but the key switches are attached to the PCB through the metal plate. I haven't been able to figure out a way to separate the metal plate without desoldering every key switch. Here's a picture from one of the times I got it working.
  3. Cicero

    Extended Keyboard II troubleshooting

    I'll give it a few more tries.
  4. Cicero

    Extended Keyboard II troubleshooting

    Aaaaand it's back to not working again. I'm so glad I have another AEK II on the way. The previous owner(s) must have poured a lot of Mt. Dew on this thing. Maybe some day I'll get bored enough to use my Hakko desoldering gun on this thing and separate the PCB from all the key switches. For now though, this thing is going into the garage.
  5. Cicero

    Extended Keyboard II troubleshooting

    Some keys are not responding and others are intermittent. This will definitely need more washing, I think.
  6. Cicero

    Extended Keyboard II troubleshooting

    Well, how about that! Alcohol bath and blow dryer revived it. There must have been some residual gunk between that non-removable metal plate and the PCB underneath causing a short. I really wish I could get under that plate and give the PCB a proper scrubbing.
  7. Cicero

    Extended Keyboard II troubleshooting

    Just got one reading the ADB section of the book. Thanks for the referral. It's very informative. Based on everything he says, I'm convinced the problem is with my keyboard and not the logic board. Mouse does not work when daisy chained. The caps lock LED does not illuminate when the caps lock key is depressed. The three LEDs come on momentarily at startup but then remain unresponsive. The RF choke filter on the keyboard PCB has good connectivity. I'm wondering if there's still some debris lodged under the metal casing that separates the key switches from the actual PCB. You can't remove the metal casing without desoldering each and every key switch. Apple was nice enough to make some of the main components accessible through those cutouts, but there's enough space between the metal casing and the PCB that it would be easy for stuff to get down there and cause a short. It was incredibly grimy and gross when I first opened it up. I'm going to try another alcohol bath, agitating the board vigorously to try and dislodge any residual garbage that might be in there.
  8. I’m interested in the solution to this ADB issue as I’m currently troubleshooting the reverse situation in which my SE/30’s mouse works fine, but the keyboard is unresponsive.
  9. First time posting here. I recently acquired an SE/30. Advertised as computer and mouse work, but keyboard does not work. Unsurprisingly with old computers shipped in the summer heat, the computer wasn’t working by the time it arrived on my front porch. I did I a full recap and cleaning of the logic board and got it up and running again. As advertised, the mouse works but the Apple Extended Keyboard II does not. I disassembled the keyboard and gave it a thorough cleaning and retrobrite treatment. After giving the keyboard main board an alcohol bath and drying it with a hair dryer, it started working again. But after sitting for a couple days, it now no longer works. The three LEDs light up briefly when it is plugged in. The ADB Mouse II works when plugged directly into either of the ADB ports on the computer, however it will not work when plugged into the keyboard. I’ve reflowed the solder on the ADB connectors on the keyboard with no change in function. I’ve confirmed continuity both on the ADB cable itself and between the ADB connectors of the keyboard. I currently do not have access to a confirmed working keyboard (ordered one that should arrive next week) or another Mac with ADB ports. Since the mouse works, I’m assuming the problem is not with the logic board. Any suggestions for further troubleshooting this keyboard?
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