About the only thing you can do is to click the joystick in the opposite direction and blow out underneath. If that does not fix it, then the unit will need to come in. If that is the case, there are two tiers of repair costs for Cyber Commander. $35 for basic repairs or $70 if they need to replace the board. The joysticks are tricky to manually replace, so a board replacement is quite possible.
Also, please note, all repairs that are sent in are subject to the diagnostic fee (the $35, in this case) and all repairs up to $85 are automatically assumed authorized for repair.
Please visit this link for more information on repairs:
http://www.paulcbuff.com/repair.php