I have a late 2013 21.5 iMac and using 1TB Fusion drive option. I want to swap the HDD to SSD lately and I did some research so I planned to do below 1. Clone everything by Carbon Copy Cloner 2. Remove boot camp. 3. reboot to recovery mode. open terminal, split fusion drive (Step here: https://www.lifewire.com/split-fusion-drive-apart-2260166) 4. shut down. open the iMac. swap the drive. 5. boot the iMac using USB drive (from step 1, tested) and clone everything back to internal SSD. I have done all the step to 5. No matter how I boot up my mac, the screen is black. It has the start up sound. mouse and keyboard have light on. I tried: Cmd-R Cmd-opt-R Cmd-opt-P-R Opt I triple check the display connection to make sure they are connected as well. HELP! Any hint or any alternative step are very welcome. Thanks
If you are just getting a black screen only, it sounds like you broke something in there while swapping out the drive.
Hey. Thanks. I checked all the visible connection again and they are all connected as expected. Do you think it would help if I swap the old HHD? Or you think it is other hardware failure?
I don't think it would help to put the other drive back. Even if the new drive was bad, you would at least get the grey startup screen. I think you may have broken something.
You can try to reset the PRAM. If it's still got a black screen after that, try plug in an external monitor and see if that works. This should isolate where the problem is.
thanks. I tried reset PRAM. no luck. (it does restart again after a while) sadly i do not have any thunderbolt VGA/DVI converter and do not have any external mon (iMac and MBA only). I am thinking to borrow. If external monitor shows up, then we can conclude that it is the display connector that I probably break?
That's right. If it doesn't work with an external monitor either then it's more likely the whole Logic Board.
I have just used it to split fusion drive so I dont think monitor or logic board is broken. mostly likely is the display connector but it looks alright to be. Anyway I booked genius bar on Sunday to see why. Thanks all.