I have a Dell Latitude CPx. The service tag and express service number has both been scratched up so that the only thing I can read is what appears to be CD??? for the service tag and 207-?24-3? for the express service number. When the machine is booted it is asking for a bios password, which I don’t have. The number CD0E6**-595B is displayed. I understand this is a conversion from the service tag. Is there anything out there that will convert the number back to either the service tag or express code?