start up and power
I Mac 21.5, 2013 dead on start up, seems no power at all.
checked all the electrical wire, took off all accessaries. tried unplugged and replugged, wait for seconds .. still not start up.
iMac 21.5", macOS 10.13
Read the instructions in https://support.apple.com/en-us/HT204267 and if you cannot get it to boot, follow the last step.
