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A B C LEDs no longer light up, APM no longer works in flight mode

Posted by flying on December 7, 2011 at 12:44am

Hi guys hope someone can help me with this..

 

After another routine fun flight with APM, it stopped working all of a sudden.

 

With the CLI switch in flight mode, APM no longer connects to my PC. The time out counts down from 30secs and gives this message:


Is your CLI switch in flight position?
System.ArgumentOutOfRangeException: Index 0 is out of range.
Parameter name: index
    at ArdupilotMega.MAVLink.Open(Boolean getparams)
    at ArdupilotMega.MainV2.MenuConnect_Click(Object sender, EventArgse)

Also, the ABC LEDs no longer flash when it is initiates a startup after I press the reset button..

 

However, I AM ABLE to connect to the PC with the CLI switch in CLI mode. I ran the tests in CLI and all are fine. In fact, when i did the IMU test in CLI, A and C LEDs blink when it is running the test.

 

I have cleared the EEPROM and reloaded the codes countless of times; but no results.

 

WHat might have gone wrong here?
I have had many flights on APM already and this problem simply came out of no where..

 

Thanks!

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Replies

  • Paul December 7, 2011 at 3:58am
    I have no idea, my apm is still playing up (I think). Esc/motors keep beeping fast after firmware .55 loaded. Though when I erase EEPROM a few times it stopped but then had to load firmware back and comes back. I might try erasing several times back to back and see if that works.
  • flying December 7, 2011 at 2:29am

    I seem to have resolved the problem.

    I kept on erasing the EEPROM 5-6 times back to back.... and somehow everything is back to normal again.

     

    Does anyone know why it behaved this way?

  • flying December 7, 2011 at 1:26am

    Some updates to my troubleshooting:

    With the CLI switch in CLI mode, I went into APMSetup, and i resetted APM hardware back to default.
    Immediately after that, I shifted teh CLI switch back into flight mode and hurray A and C LEDs blink and intialise the gyros and accel as it should. And I could connect to my PC in flight mode.


    However, once I disconnected APM and tried reconnecting APM in flight mode again, the same problem resurfaced...

     

    Im really at my wits' end here......

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