Could the HD prevent an iMac from booting up at all?
I am no electronics expert, but I am trying to fix a faulty early 2006 20" iMac (that showed no sign of accepting power) and just replaced the PSU.
Now, here is the problem: the iMac will boot ok with the new PSU, as long as the HD is NOT connected. The minute I connect it (power, data and thermal sensor cables), then the iMac won't start at all and appears dead. Could it be that the HD is itself faulty and causing a short-circuit? Any idea?
Your thoughts and advice are most appreciated! Thanks.
Is this a good question?