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Malfunction — Parallax Forums

Malfunction

AImanAIman Posts: 531
edited 2007-02-03 17:31 in General Discussion
My BS2 decided it didn't want to work. None of the cable were altered and the power LED comes on but I still get "No Basic Stamps Found". The only change I made to the circuit was moving some resistors up a pin and after that the stamp isn't recognized. When the resistors were moved - with the power off - the LED display did come on and off momentairly.

I tried reconnecting the USB to the stamp, turned the stamp on and off several times, tried different programs, checked and rechecked connections but nothing changed the resuts.


Ideas?

Comments

  • latigerlillylatigerlilly Posts: 114
    edited 2007-02-03 05:11
    Dude,

    I think you fried your Stamp 2 chip. If you are using the BOE, it is a very small and crowded breadboard (more like a bread crumb). Before I turn it on every time, I check and re-check to see if any of the LED leads are touching. When found, I use a tweezer to separate them. Then, and only then to I turn it on. The fact that your LED came on momentarily suggests that there was a short circuit. That's why I'm using the PDB now... much bigger breadboard (about half a slice).

    Here's how you narrow down the culprit;
    1. Try a different computer to hook it up to.
    2. Try a different program (download the editor of the newest version off the Parallax website) - you already did this, "tried different programs".
    These steps will isolate your problem as a computer hardware/software problem.

    3. Try putting your BS2 on a different board.
    4. Try putting anoter BS2 on your board.
    These steps will isolate your problem as a BS2 problem or BOE problem.

    5. Replace the component that is not working.

    Try this and see,
    Lilly.
  • AImanAIman Posts: 531
    edited 2007-02-03 17:22
    I was suspecting that I may have fried the stamp - so here is more detail based on what you suggested.

    1. Try a different computer to hook it up to.

    ·· There is a second BS2 on a different board with a different power supply, it accepts the program without any problems. So now its swap out the stamps and see what happens.

    - Use a Needle nose to put in componets. Its a pliers made for electrical work with a long flat snout. Takes about the same space as a tweezers and gives a lot more controll.


    ·
  • AImanAIman Posts: 531
    edited 2007-02-03 17:31
    It was the stamp.

    The second stamp accepted the program on both boards but the stamp in question didn't.

    Both boards ran different power sources and loaded from the same computer.
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