Solution 21931: Connect-to-Class™ Software Will not Communicate with a TI-Nspire™ Family Device in Press-to-Test Mode.
How can I get Connect-to-Class to communicate with a TI-Nspire family device in Press-to-Test mode?
In some cases, a device placed into Press-to-Test mode while connected to Connect-to-Class software may lose connectivity. To restore connectivity to this device, unplug the USB cable from the device, and then reconnect it. The device should communicate successfully after this point.