iMac won't boot up
Won't boot up. White screen fan noise for a few seconds, there's a crack then it shuts down
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Sounds like a power issue. Did you have a lightning storm or high winds in the area? What can happen is a power surge zaps your system power supply and it can also damage your logic board
Time to inspect things to see if you ca spot the damage. Follow this guide to check the Power Supply iMac Intel 27" EMC 2429 Power Supply Replacement you’ll need to inspect the capacitors and power transistors for swelling or burnt. The main logic board will likewise need to be pulled to inspect it fully as well. Pickup from Step 14 in this guide [Installing iMac Intel 27" EMC 2429 Dual Drive Kit (HDD or SSD)
Let us know what you discover!
Guide
iMac Intel 27" EMC 2429 Power Supply Replacement
Difficulty:
Moderate
—
20 - 30 minutes
Guide
Installing iMac Intel 27" EMC 2429 Dual Drive Kit (HDD or SSD)
Difficulty:
Difficult
—
1 - 3 hours
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