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I'm looking for advice. I pulled my Mindstorms 8547 kit out of storage and started to play with it after several years of inactivity.

I found that the Color Sensor, the Ultra Sonic Sensor, and the position read back on motors all do not function. I downloaded the latest software and firmware version 1.31.

Any idea what is going on? Do I need to go back to a previous firmware version to get things to work as they did originally?

Any advice is appreciated, thank you.

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  • Is there any chance it's simply your code that isn't working? Could you add a screenshot of the program you're using to test the functions? – MindS1 Nov 27 '18 at 1:40
  • Using the "View" directly from the NXT brick to test the sensors, just get all ?????on the display with the color or ultrasonic sensor plugged in. – Paul Nov 28 '18 at 22:34
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Check for 5V on the two middle pins of the motor connectors (plug a cable into the brick, no motor on the other end, and measure volatege on the contacts of the open other end). NXT/EV3 have separate power to all the sensors, if there's a short (failed capacitor or similar) or the power chip failed then the brick will still work, but the sensors won't get power.

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