Complaint number MJC596997 4/7/2015, complaint attended by Mr. Mallika Arjun on 6. 7. 2015This is to inform you that the above product is covered under Warranty and the failure component was BOARD, as per Service engineer. SE changed the board with old used board. Still I am not convenience with your warranty clause that :1. As per warranty, suppose to replaced with NEW BOARD not old board. 2. After changing the Board, while charging the UPS the, TV and other electronics appliances disturbed with sound. Earlier there is no sound while charging the UPS. I had told this problem to your Service Engineer, he is not accepting and as perThe this product is like and if your working TV, while charging, then the disturbance will come. Kindly let me know, what is the reliability of replaced old Board and if such sound is coming then how will work the T. V. And other appliances. I am awaiting your immediate action on this matter.