Not sure if this is hardware or software but one of my NewPacs has just zombied and it seems to have acquired the serial number of the one above?Huh
 6: GSH 10036077: BM1387:02+ 350.00MHz T:350 P:350 (107:54)  | 96.2% WU: 97% | 74.45G / 77.54Gh/s WU:1083.3/m         
 0: GSH 10036077: BM1387:02+ 203.12MHz T:350 P:350 (176:93)  | 86.1% WU:100% | ZOMBIE

If not... any suggestions please.