The full screen with Retina LCD and 17 "iMac glass will do just fine! You will be able to repair the full screen and you won't have to worry about your computer.
iMac 27" Retina 5K spare parts End of 2015 (A1419 - EMC 2834) (10 produits)
If your iMac's power supply is not working well, it is normal to replace it. Because you are never sure that your computer will turn on, you might as well change the power supply while your PC is still functional and is not completely damaged. With this new iMac 27 "A1419 (2012-2015) power supply, the current will be better transmitted to the computer.
The OWC Mercury Electra 250 GB 2.5 "SSD (OWCSSDEX6G250) for Mac will keep your computer in good condition! With its compact and slim size, this SSD adapts to all iMacs. Your iMac will not overheat, and no more noise will be heard! With the 250 GB you will have files to save!
Are you afraid of losing your data by changing your hard drive? This USB 3.0 case for 2.5 "hard drive is ideal for transferring data between the two, or even for using it directly as an external hard drive!
With its 14 available ports, you can connect all your wires! All of your Mac accessories will fit, and cables won't hang everywhere.