.
Call the Chennai nodal office, explain them the issue, and request them for a box replacement. As your box would still be under the 1 year warranty, there shouldn't be an issue in getting your box replaced, free of cost.
Call will be picked up by a SUN TV telephone operator. After they pick up the call, request the operator to connect you to the Sun Direct department.
Chennai Nodal Customer Care Number:
044 - 44676767