@DJ Omnimaga: do you have a source about this ?

Unwanted contacts with adjacent pins happened to me many times.
And it never bricked the calculator.



Anyway, here's the complete process:

- remove any OS using the maintenance menu (hold Doc+Enter+EE while resetting)

- download a Boot2 3.1 image for the TI-Nspire CX:
http://tiplanet.org/forum/archives_voir.php?id=4617

- connect and secure the three Tx, Rx and GND wires to the Dock/J01 connector


- install and run a compatible terminal software (like the Hyperterminal private edition coming with Windows up to Vista)

- configure it with:
* the right COM port (check your device manager to know which one your adapter did default to)
* Baud rate = 115200
* Data = 8 bit
* Parity = none
* Stop = 1 bit
* Flow control = none

- trigger the calculator Boot2 update mode be resetting while holding Doc+Enter+2
(beware, they will be a timeout - just reset and try again if you're not fast enough)

- from the terminal send the previously downloaded file using the Xmodem protocol

- install one of the available Nlaunch packs

Hello, I have been reading the post and not do the last step. " from the terminal send the previously downloaded file using the Xmodem protocol"

What should I do to send the file? What should I write or I do?

No other way to downgrade? I bought my TI a few days ago and have the version 3.9

Thanks