Answers.Body: <p>Looks like it might be a defective motor driver chip (though they are pretty tough!). What happens if you connect the motor on another port of the same brick? (with program change to reflect port modification)</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-07-19T08:27:28.857Z
Answers.LastActivityDate: 2013-07-19T08:27:28.857Z
Answers.UserDisplayName: Philo
Body: <p>I think I have a defective NXT brick. It has been programmed to move in a direction for 1 second, wait 1 second  and then move in the reverse direction for 1 second. The code downloads on another brick and works fine. I have tried changing the battery pack, changing the motor, changing laptops, changing usb cords, cables, etc. and bricks. The problem has been isolated to the brick. I tried a soft reset and ultimately a hard reset with new firmware download and nothing works. I am truly perplexed. I am using Windows 7 and also tried it on XP. The motor will run in one direction. It starts off slow, speeds up, pauses, and then goes faster. When I turn the brick on, the motor runs briefly before the NXT chirp sound comes up. Yes it is plugged into the correct motor port.</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-07-19T16:35:52.197Z
Comments.Text: Since you've thoroughly narrowed it down to the brick itself, you'd probably be safer to contact the [LEGO customer service](http://service.lego.com/) to ask for a replacement
Comments.UserDisplayName: Joubarc
Tags: <nxt><mindstorms><programming>
Title: NXT brick erratic programming behavior
UserDisplayName: BotGyrl
ThreadText: # NXT brick erratic programming behavior
  
  (Asked by: username_0 on 2013-07-11)
  
  I think I have a defective NXT brick. It has been programmed to move in a direction for 1 second, wait 1 second and then move in the reverse direction for 1 second. The code downloads on another brick and works fine. I have tried changing the battery pack, changing the motor, changing laptops, changing usb cords, cables, etc. and bricks. The problem has been isolated to the brick. I tried a soft reset and ultimately a hard reset with new firmware download and nothing works. I am truly perplexed. I am using Windows 7 and also tried it on XP. The motor will run in one direction. It starts off slow, speeds up, pauses, and then goes faster. When I turn the brick on, the motor runs briefly before the NXT chirp sound comes up. Yes it is plugged into the correct motor port.
  
  **Tags:** nxt, mindstorms, programming
  > **Comments:**
  > **username_1**: Since you've thoroughly narrowed it down to the brick itself, you'd probably be safer to contact the [LEGO customer service](http://service.lego.com/) to ask for a replacement  
  
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  ## 1 answers
  
  ### Answer by username_2 on 2013-07-19. Score: 2
  
  Looks like it might be a defective motor driver chip (though they are pretty tough!). What happens if you connect the motor on another port of the same brick? (with program change to reflect port modification)
  
  
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