It sounds like the OS has been wiped. Use JL_Cmder in my signature to wipe the device again. It should change to an Error 507. Then you should be able to load the 7230 OS to it.
Download the OS
Delete the file labeled "vendor.xml" located in c:\program files\common files\research in motion\apploader
Plug in device.
Run Loader.exe (found in same path as the vendor.xml file above)
That should reload the OS. Once the OS is reloaded you'll probably find that the device has IT policy on it. You'll want to fix that using method 2 of the post below: http://www.blackberryforums.com/gene...ve-policy.html