touchtunes is completely locked down and must constantly be able authenticate with their main server to operate or it will disable itself.
the hard drive boot sequence includes a security key check which checks for the jukebox ID number stored on the key and then uses that key data to unlock and decrypt the main partition of the hard drive. once that passes and starts loading, the jukebox software checks the current time and date against when the last authentication with the server was. if it's been more than 5 days and it cannot contact the server still, it will display an error (machine will disable itself in XX days contact operator) but this message can be dismissed and the jukebox will still operate in a limited mode. if it's been more than 30 days, it will lock itself until it can authenticate. (machine disabled call operator)
any messing with the system time in reverse (trying to roll back the date) will result in immediate lockdown of the system.
if there is no security key, the boot sequence will fail because there is no key to unlock the main partition with. installing a security key that is not that harddrive's key will result in the system having to re-authenticate the key with touchtunes server and then re-encrypt the drive for the new key. not an issue if you have an account with thouchtunes, that key is assigned to your account, the key is still good, (hasn't been disabled or blacklisted).
as you see, touchtunes does not want joe schmoe operating an old jukebox with their software.
like mentioned here by alrolon800, best just load your own OS on a computer and use your own music.