sharp 450 scann disappears?

[jpcopy]

just checking to see if anyone else has had this problem. turned machine off friday and come monday scann is gone. I know that it would be easily reinstalled if I have the code for this machine, but I don't as it came in some used machines we bough. we set it up here in the office about a year ago and no problems untill now. if we could change the serial number to a machine that we have the code for it might work but we don't have that info either. anyone possibly have the info. I have some of the hidden codes for this machine but nothing on changing the serial number. might not work anyway but I would like to give it a try. Is the scann disappearing a common thing with this machine? no work, unusal use or power problems over the weekend that we are aware of. any help, comments or views welcome
jp

[ZOOTECH]

You don't want to change serial numbers; contact Productkey Support and give the model and serial number (as shown in the TC 22-5) and ask for a re-issue. If the scan was in demo mode (TC 26-10) and scans exceeded 500, that would disable scanning.

[tmaged]

Sharp will only reissue you a product key to the original dealer. I assume since you bought them used you're not the original (unless your dealership bought the NS-2's to activate).
From what I've been told, you can change the serial number in the special codes then use a good known product key for that serial number. I believe the code is 84 or 85. We were told that another dealer was doing this & that's why they were always cheaper on bids !!!!