how can i make back camera and flashlight working in htc 816g

[AC Question]

I have htc816g.recently i have changed display with full set.after that back camera and flashlight is stopped work.pls any one help me how to get it those back....

 

[B. Diddy]

Welcome to Android Central! What do you mean that you "changed display with full set"? Do you mean a full factory reset? Does the camera work in Safe Mode? How to turn on safe mode on Htc Desire 816