iMac will not boot.
My son's mid 2007 iMac failed last week. It's EMC number is 2134 and it's Model is A1225. I took it to the Genius Bar and the tech there said it was the power supply. He said it failed as soon as it asked for more than the trickle charge. So I went home and ordered a new power supply. The power supply that I received has the same form factor as the original but otherwise looks quite a bit different. In other words, it fits in the machine and has all the right connectors but isn't the same part.
New Power Supply
Old Power Supply
The new power supply has a serial number of MV80508M1XCPA while the old one has a serial number of Z273008JWXCQA. The parts person I ordered them from insists that Apple says both of those EEE codes (XCQ and XCP) point to replacement part 661-4478 and that the part he supplied is that part number.
When I install the new power supply the first diagnostic light on the logic board lights up briefly and then goes out. When I re-install the old power supply the three lights on the logic board light up and I hear the hard drive start to spin and then everything goes out. The screen never lights up etc.
I guess my question is, I obviously need to return the power supply I bought but do I need to find a replacement that matches my power supply exactly? Do I need a different part number? Does this behavior (LED lights) sound like a power supply issue? Any help or advice would be very much appreciated!
Is this a good question?