After replacing PowerFlex 70, the HIM is blind???

Hi, guys, how are you?

We had one PowerFlex 70 (20A E 2P7 A 1 AYYNNN  Ser A) with HIM (20-HIM-A1  SERIES A). They worked well.

Today that PowerFlex 70 was defective, so we installed a new one (20A E 2P7 A 0 AYNNNCO  Ser A).

We do not change the HIM, because we tested it on another PF 70 and it’s functional.

But after we put the HIM (20-HIM-A1  SERIES A) on new PowerFlex 70 (20A E 2P7 A 0 AYNNNCO  Ser A). That HIM is blind/no display after powered up.

Could you give us a help to figure out what the problem is?

Thanks.