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Apple Computing Products:
macOS - Desktop Hardware
iMac late 2013 - how to perform Apple Diagnostics with external monitor? Screen dead
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<blockquote data-quote="chscag" data-source="post: 1768907" data-attributes="member: 46727"><p>Welcome to our forums.</p><p></p><p>It's possible your machine has a loose video cable. Go to <a href="http://www.ifixit.com" target="_blank">www.ifixit.com</a> and look up the instructions for removing the display from the machine so you can check the cables and connections. Be very careful when doing so and be sure to order the kit that has the glue strips to put your iMac back together. If you think you do not have the necessary skills to do the work, take the machine to an Apple Store or an authorized Apple service dealer and have them do it.</p><p></p><p>BTW, the Apple Hardware Test is not the best. Only the diagnostics used by Apple Technicians is really of any value.</p></blockquote><p></p>
[QUOTE="chscag, post: 1768907, member: 46727"] Welcome to our forums. It's possible your machine has a loose video cable. Go to [url]www.ifixit.com[/url] and look up the instructions for removing the display from the machine so you can check the cables and connections. Be very careful when doing so and be sure to order the kit that has the glue strips to put your iMac back together. If you think you do not have the necessary skills to do the work, take the machine to an Apple Store or an authorized Apple service dealer and have them do it. BTW, the Apple Hardware Test is not the best. Only the diagnostics used by Apple Technicians is really of any value. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac late 2013 - how to perform Apple Diagnostics with external monitor? Screen dead
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