Just now I heard from my Assembler he told that The MB is the problem. Due to voltage Fluctuation The MotherBoard is out(can't be used anymore). Anyway I will get the Full Replacement as it has got 3 Year Warranty. I have a locally made UPS. not APC or TVS or any wellknown brand. What are the reasons for Voltage Fluctuations. Is it my Local UPS(500VA) or my SMPS or what might be the reason ????? Shall I go for new UPS like APC UPS 600VA. How to avoid these in the Future ???? why I'm asking this question is this should not repeat in the future. Thanx Arsenal.