Just sent my camera in to NSC regarding the camera freezing, as well as still able to shoot when power off.
The receptionist sent in my camera for the technician to check, came back out within 5 mins, told me nothing wrong with my camera. Issue is due to me setting the "Camera Sensor Cleaning during Power On/Off" on. I was like, :what:. I don't accept this explaination, told them that this shouldn't be the cause of the problem, my previous D90 doesn't have this issue. And i even demonstrated to them that i am still able to shoot with the camera off, which their demo set in the showroom doesn't have this issue. In the end, left my camera at NSC for further diagnosis.
What i am trying to say is, are the technicians trying to smoke through with some explainations which doesn't make sense at all? If i didn't stand firm, i will be collecting back my faulty camera thinking that nothing is wrong with it. At least, the attitude and service by the receptionist and the other staff who attended to me is pretty friendly and nice. To all those who are sending in your equipments to NSC, know what the faults are, be firm and insist your equipments be checked thoroughly.