3 Replies Latest reply: Jun 22, 2013 12:47 PM by francorelli
francorelli Level 1 Level 1

How do I reset the SMU/PMU on my 20" iMac G5 2GHz? (There is no button on the motherboard as shown on Apple's site..) Thanks..


PS. Machine doesn't boot. I heave removed the back cover and tested the power button. LED1 lights up and the instructions on apple's site say to try the SMU reset button next. There are two sets of little terminals for similar buttons and two little symbols the same size as the power button symbol printed on the board but no actual buttons. Any help welcome, thanks.

iMac G5, Mac OS X (10.4.11)
Solved by Allan Jones on Jun 21, 2013 6:54 PM Solved

This article:




states the older G5s had the button but newer models use the procedure outlined in the article. Sounds like yours is newer than the "button" models.