Few ways to identify Contact service is hardware or not

1st way..
Do self test and check
"Main LCD IF" failed ................ Check display HW and Retu HW.
SLEEP X LOOP if failed ................ Change Retu.

2nd way..
Power on phone without sim. If phone display contact service instantly when u pressed power button then it's hardware. check Retu(90%)



3rd way..
change phone mode to normal mode. if phone work without problem then it's HW problem. Check Retu.

** If all OK then try with software. Write full pm with auth.