Reliance Mobile
Handset Screen not working

I purchased one Reliance LG hand set Model No. LG-RO-3610 IMEI NO.RLGHS1033844220 on dt.06.06.2009. Yesterday suddenly the screen of hand set off. Nothing is showing the screen even I could not identify the number. Kindly let me know from where I can repair it or replace it becasue yet it has not been passed one year becasue it is in one year warranty. I am small private service man, please show me the path what to do. Your early responce will be highely appriciated.