Power supply for all 21.5" iMacs A1418 and A2116. Very common problem when iMac doesn't power on. It is an used pulled original Apple part. 

APN: 661-7111 / 661-7512
Compatible with:

A1418 Late 2012 iMac13,1 2.7 GHz

A1418 Late 2012 iMac13,1 2.9 GHz

A1418 Late 2012 iMac13,1 3.1 GHz
A1418 Early 2013 Edu iMac13,1 3.3 GHz

A1418 EMC 2638 Late 2013 iMac14,1 2.7 GHz

A1418 EMC 2742 Late 2013 iMac14,3 2.9 GHz

A1418 EMC 2742 Late 2013 iMac14,3 3.1 GHz
A1418 Mid 2014 iMac14,4 1.4 GHz

A1418 Late 2015 iMac16,1 1.6 GHz

A1418 Late 2015 iMac16,1 2.8 GHz
A1418 non 4K Mid 2017 iMac18,1 2.3 GHz

A1418 EMC 2833 iMac16,2 3.1 GHz

A1418 EMC 2833 iMac16,2 3.3 GHz

A1418 EMC 3069 iMac18,2 3.0 GHz

A1418 EMC 3069 iMac18,2 3.4 GHz

A1418 EMC 3069 iMac18,2 3.6 GHz

A2116 EMC 3195 iMac19,2 3.0 GHz

A2116 EMC 3195 iMac19,2 3.2 GHz

A2116 EMC 3195 iMac19,2 3.6 GHz