Lg d821 nexus 5 imei 0 repair not working

LOG:

Code:

LG 2-3G Tool v9.19
supported models: 1310

Mode: Normal
Model: AAAAANAZ
Build version:  Feb 17 201618:13:28Sep 03 201407:00:00AAAAANAZ
SW Version: M8974A-2.0.50.2.29
IMEI: 00000000000000-0
BlueTooth Address: 00:00:00:00:00:00
Phone Code: default
SPC: 000000
Elapsed: 1 secs. --> (v9.19)
 
Repair IMEI...
Search LG Modem port...
Detected LG Modem port at COM408


And stuck at this i let him about 1 hour and always stuck at Detected LG Modem port at COM408

and repair not done

phone os ver : 6.0.1
build number: MOB31E

P.S. IMEI REPAIR WORKING AND IT SAYS DONE BUT INFACT IT’S NOT!.