2013 imac 21.5” power issue, replaced power supply twice, still no diagnostic LED on. The Mac will power on after being plugged in for several hours. And then powers on like nothing
iMac 2009-2011 - iRevive
Apple Technician Guide for iMac (21.5-inch, Late 2009)
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Amazon.com: OWC 2.0TB HDD Upgrade Kit Compatible With 2009-2010 iMacs, Includes: Thermal Sensor, Tools, 2.0TB Hard Drive : Electronics
iMac No power hardware troubleshooting using Diagnostic LEDs - YouTube
Apple Technician Guide iMac (27-inch, Late 2009)
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iMac 2009 27" internal display black/blan… - Apple Community
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
Apple Technician Guide for iMac (21.5-inch, Late 2009)
27" iMac suddenly won't turn on… completely dead? | MacRumors Forums
Diagnostic LEDs - Apple Mac Pro - Mac Specialist
SOLVED: Where are the diagnostic LEDs on the iMac mid-2011 27" EMC 2429? - iMac mid-2011 27" EMC 2429 (2.7GHz i5) - iFixit
Promotion A1311 Laptop Motherboard 2009 2010 2011 For IMac 21.5'' Logic Board 820-2494-A 820-2784-A System Accessory Fully Work - AliExpress
iMac 21.5" 2010 - GPU Replacement - Not booting : r/mac
