LEGO Engineering :: My NXT is frozen and I can't reload the firmware (I'm using NXT-G)!

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My NXT is frozen and I can't reload the firmware (I'm using NXT-G)!

20th of April, 2010

(11 )

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Make sure the LEGO MINDSTORMS NXT is connected directly to the computer using a USB cable (a Bluetooth connection will not work).
Press the hardware reset button on the NXT brick for at least 3-5 seconds. The hardware reset button is a tiny little button at the bottom of the pinhole on the bottom of the NXT case, just under the USB connector. You can push it with an unfolded paperclip or a LEGO antenna.
If the NXT is clicking before you press the hardware reset button, it will stop clicking after you press the hardware reset button. Continue to press on the hardware reset button for a few seconds longer until it clicks one time. Now release the hardware reset button.
Wait for the NXT to start clicking continuously again (approximately 2-4 seconds).
Go to the menubar within the LEGO Mindstorms NXT Software and\nselect Tools -> Update Firmware, select a firmware version and\npress Download.
If the software is unable to download the firmware correctly after going through the above process, please verify that you have the correct USB driver version installed:

Open a Windows Explorer window
Go to the folder called “WINNT” or “windows”
Go to the folder called “system32”
Find the file called “fantom.dll”
Right click on File and select Properties
Under the version tap, the file should have the following version number: 1.0.2.49152. If it has version number 1.0.1.49152 you need to update the USB driver.
To update the USB driver please go to http://mindstorms.lego.com/Support/Updates/ and download the latest version of the Mindstorms NXT Driver and install the driver. Before running the installation, close the LEGO Mindstorms NXT software and disconnect the NXT brick from the computer.