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1. support.apple.com › guide › mac-helpDiagnose problems on Mac - Apple Support

   support.apple.com › guide › mac-help

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   Apple Diagnostics is a tool you can use to diagnose problems with your computer’s internal hardware, such as the logic board, memory, and wireless components. You may be able to start your Mac with Apple Diagnostics, even if it doesn’t start using macOS.

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     Get personalized access to solutions for your Apple...

2. support.apple.com › mac › imaciMac - Official Apple Support

   support.apple.com › mac › imac

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   Get personalized access to solutions for your Apple products. Download the Apple Support app. Learn how to set up and use your iMac. Find all the topics, resources, and contact options you need for your iMac.

3. www.ifixit.com › Answers › ViewSOLVED: Diagnostic lights and no screen issue - iMac 27" 2017

   www.ifixit.com › Answers › View

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   6 gru 2021 · The iMac (Retina 5K, 27-inch, 2017) model has five diagnostic LEDs and two pairs of test pads that can help you troubleshoot the computer without removing the logic board. The coin battery, located on the back of the logic board, provides power to the real-time clock (RTC) and parameter RAM (PRAM) when the computer is not connected to an AC ...

4. support.apple.com › en-us › 102550Use Apple Diagnostics to test your Mac - Apple Support

   support.apple.com › en-us › 102550

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   10 sty 2024 · If you think your Mac might have a hardware issue, you can use Apple Diagnostics to help determine which hardware component might be at fault. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.

5. discussions.apple.com › docs › DOC-250000361Mac Basic Startup Troubleshooting Steps - Apple Community

   discussions.apple.com › docs › DOC-250000361

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   13 mar 2024 · Run either the Apple Hardware Test (AHT) or Apple Diagnostics to uncover any potential hardware issues with the Mac. Apple Diagnostics (2013-2020 Intel Macs & 2020+ Silicon Macs)

6. www.ifixit.com › Device › iMac_Intel_27"_EMC_2639iMac Intel 27" EMC 2639 Repair - iFixit

   www.ifixit.com › Device › iMac_Intel_27"_EMC_2639

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   iMac Intel 27" EMC 2639 Repair. Model A1419 / Late 2013 / 3.2 & 3.4 GHz Core i5 or 3.5 GHz Core i7 Processor, ID iMac14,2. Author: Sam Goldheart (and 5 other contributors) Create a Guide. I Have This.

7. discussions.apple.com › thread › 254797704iMac 27" (2010) Troubleshooting Tips - Co… - Apple Community

   discussions.apple.com › thread › 254797704

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   18 kwi 2023 · Greetings folks, I'm looking to revive an old 27" iMac (2010) for my kids and could do with some tips and/or suggestions on the best way to troubleshoot the system and isolate faulty parts. When I received the iMac I was told that the GPU (Radeon 5750) may need to be replaced.