Guys, need some advice here. I have an iMac 2010 (A1312), and out of sudden today, when i try to on it. It boot up and once after the apple logo with spinning wheel it just showed me a white blank screen. Details of boot up: 1. Power on 2. Chim sound 3. Apple Logo + spinning wheel 4. White screen Currently my wireless keyboard cant be connected to it and i got no idea why as well, the keyboard kept on blinking its green light. As such, i am unable to press any keys to get it into recovery mode. Why is this happening out of sudden?