Originally Posted by
GMPX
It can't be repaired I'm afraid, TIS corrupts it in some way that the ECM wipes a lot of data out. Under certain circumstances (such as these TIS corrupted ECM's) EFILive will accept the zeroed serial number as a valid license, unfortunately it's a common problem and we thought it was only fair to allow people to still flash the ECM in that condition. AFAIK, it is only a problem on the 01's, maybe the early 02's as well. And, you certainly will cause corruption if you flash a later model OS in to the early ECM.