dude first of all ask some reliable technician as they will force you to buy new mobo. Ask him to operate the PC using some new mobo, if this is successful than your mobo is gone and it's time to get new oneDone! I called technician, he also suggested to clean ram slots, bt problem is still thr. I had even called him again but he is not able to locate the problem. Thrz no problem with ups as i checked by using another ups. Any help? Thanx in advance !