Microtek Inverters — after replace invertor board, invertor is not working properly

Address:

Sangrur, Punjab

(Model-upseb860 s.no 12HGPNS450171 Dear sir, microtek engg replace my invertor board, after replaced this board, invertor is totally dead, and engg says it will cost rs 1100, pls tell me under warrenty, why should i pay 1100 rs. abhishek singla [protected]