How to upgrade the firmware on an Ingenico iSC250 to version 14.0.6 for EMV using the USB drive and dongle from Red Rook.
1)
Power off the Ingenico by unplugging the AC adapter or removing the power connection
from the serial cable. After the device is fully powered off, disconnect the
serial cable from the PC it is connected to. 
2) Connect the flash drive to the USB dongle, but do
not plug into the Ingenico at this time. 
3) Plug in the AC adapter or power connection and
power on the Ingenico while holding down the “1” button at the same time, until
a star (*) appears on the screen.
4) The star (*) will display very briefly about one
second after powering on, at this point you must quickly type “3,4,6” on the
keypad. 
If you see the NCR logo or any
other screens then the boot sequence has progressed too far, and you may use
the Minus (-) and Clear buttons to restart the device if necessary.
5) You will see “LLT” displayed
if the code entry was successful. 
6) Connect the USB dongle to the Ingenico USB port and
then press the Minus (-) and Clear buttons to reboot.

7) Hold down the “4” key during the boot up sequence
until the screen displays “USB Mass Storage.” This will be followed by a
version number and “Software Activate.”

Wait about 30 seconds and the
device will reboot automatically.
8)
You may see an initialization screen after first reboot. Wait 30 seconds and it
will reboot and initialize automatically. 
9) Once the device boot has
completed and displays the NCR logo, disconnect the AC power adapter or power
connector, disconnect the USB dongle, reconnect the serial cable to the POS and
then reconnect the power.
This completes the firmware update. Consult your
Counterpoint support partner for assistance completing the remaining
requirements for enabling EMV support