D855 no signal

i have d855.its imei was 000000
i restored its imei according to back label. now it is showoing no service
i tried different qcn files but still showing no sevice. when i perform repair network option it shows soruces files not found as shown in the following log.
--------------------------------------------------------------------------------
Checking data...OK

Platform: LG Qualcomm
Selected port: COM63
Selected model: D855
Reading info...
Model ID: LG-D855
IMEI: 354153-06-426685-0
Android version: 6.0
Battery level: 37%
SW Version: D85530n
Mode: Normal
Firmware compiled date: Feb 17 2016
Firmware compiled time: 21:00:00
Firmware released date: Aug 16 2016
Firmware released time: 15:49:27
SW Version: MPSS.DI.2.0.1.c1.13-00111-M8974AAAAANPZM-1.44479.1
IMEI: 354153-06-426685-0
SPC: 000000
Checking Resource File...Failed!
Resource file was not found!
Performed by 2.8.0 Software version.