Hi, I have an imac which refuses to turn on. completely dead. I don’t believe it’s the cable and have swapped out the fuse for one I know works, but it still won’t turn on. It’s as if no power. On/off button feels as it should. No warning at all just didn’t turn on one day. It’s been sitting for a few months now but not sure what to do with it. If it’s something internal, can the local computer fixer take a look or must it go to an apple repairer, probably at huge cost Any ideas?