Imac will not start - iMac Apple Computers & Internet

To factory reset an iMac without a login or keyboard, you can try the following steps:

1. Boot the iMac in Target Disk Mode: Connect the iMac to another Mac using a Thunderbolt cable. Power on the iMac while holding down the T key. The iMac should appear as an external disk on the other Mac.
2. Reinstall macOS: Open the Disk Utility app on the other Mac and select the iMac disk. Choose "Erase" and follow the on-screen instructions to erase the iMac's drive. After erasing, quit Disk Utility and follow the on-screen instructions to reinstall macOS.
3. Restore from Time Machine Backup: If you have a Time Machine backup of the iMac, you can restore the backup to the iMac after reinstalling macOS.

If these steps don't work, you may need to seek assistance from an Apple Store or a professional repair service.

There is no clear answer online, but it does not look like you can. Apple has the option to purchase an iMac with a VESA mount, but it is a build to order option.

I would recommend a call to Apple 800-692-7753. Have your serial number handy, it will help them find the specs for your iMac.

Here's a video Charles East suggested as a solution to your problem from YouTube:


How To Fix White Screen On Your Mac

Mine the same, so don't connect until installation complete, then switch on the or plug in the item

The issue you are having is one in Intel, the other is G3.
This is how to do it. 1. put the cd/dvd into the laptop and restart the laptop in Target mode.
2. connect the laptop to the iMac with a Firewire cable.
3. Start the imac and immediatle hold down the alt/option key.
4. after a moment you will be offered a choice of start-up discs - one of which will be the CD/dvd in the laptop.
5. Start from the CD and then when asked, select the iMac drive as the destination. This ensures that the imac loads the correct version of the OS for its processor. Should work without a hitch.

IMac Have USB ports and your WD hard drive comes with a USB cable. Just connect to one of the USB ports of IMac and you are set. IMac reads and formats to Mac OS
Good luck!

Have you started up in a different mode yet? Safe mode, etc? https://support.apple.com/en-us/HT201573

I'm not sure if these are what you need or if you have 17 inch or 20 inch, but here are links to the Mac service manuals that might help you out.

http://tim.id.au/laptops/apple/iMac/iMac%20G5%20(17-inch%20iSight)%2006-08.pdf

http://tim.id.au/laptops/apple/iMac/iMac%20G5%20(20-inch,%20iSight)%2006-10.pdf

http://tim.id.au/laptops/apple/iMac/iMac%20(20-inch%20Mid%202007)%2007-08.pdf

It can not find the hard drive or the startup folder on the hard drive. Try and fix that by putting in the original boot cd/dvd and repair and choose your hard drive start up folde as boot device. If you can not your hard drive may have died.

Power supplies are notorious on these for going bad. Goto the apple website and see if reseting the PMU will restore the unit if not try a local apple store for help.