I can still see some of the images on my screen form my previous login. For example I can make out the mouse cursor and various frozen icons.
I have attempted to reboot it several times and the images do not go away.
I have also tried taking screen shots of the images however they are not shown. Perhaps this gives some indication of the problem?
Welcome to the Apple Support Communities.
This indicates a hardware problem. If your Mac is not on this list: Obtaining service for your Apple product after an expired warranty - Apple Support, contact Apple here for repair options: Get Support.
If you Mac is on the vintage or obsolete list, parts are limited and may not be available, and you should consider a new Mac.
Jack
What you describe sounds to me like "burn in". It was common back in the days of CRT monitors and was a big reason screen saver were invented. I didn't think this was still possible with the modern Mac.
But, for future reference, you might consider to enable your screensaver or allow the monitor to shut down after a short time, rather then leave any image on the screen for a long spell.
Yes, I know, that doesn't solve your problem, but I only had $0.02 to spare for now. 😉
Image Persistence is temporary, it can be avoided and fixed.
please have a look at > https://support.apple.com/en-us/HT202580
iMac 27inch display problem
