I have 2006 iMac which has faulty motherboard, all other components have been verified to be working. The problem is that the machine does not boot, it does power up when pressing the power button, hard disk spins and optical drive makes the usual sounds it should. However, fans do not spin, they both make one small rapid movement but do not spin. Also if I connect a USB device, like my backlight keyboard I have, the backlight will blink quickly , every time. The machine will stay in this braindead state until I power it down. Heatsink gets warm. I know that these models suffer from GPU defect (ATI X1600) and I have already sent this to guy technician for reballing which should be done now but above symptoms were present before this reballing. He now sugges that I sent the board back and he'll reball the Intel chipset as (according to him) it controls pretty much everything on the motherboard, includin fans. I would like to ask if anyone here has had these same kind of symptoms and managed to get the board fixed? Also all types of suggestions whether or not it could be a chipset problem or not are welcomed. There are no bad caps visible, most of the are solid caps.