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Apple Computing Products:
macOS - Desktop Hardware
My iMac Screen occasionally flickers and dims
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<blockquote data-quote="pm-r" data-source="post: 1629962" data-attributes="member: 175845"><p>Lots of users have had similar problem if you want to check:</p><p><a href="https://www.google.ca/search?client=safari&rls=en&q=imac+flicker+and+dim&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=d-6dVMOkDsKFoQTO7oCoBg" target="_blank">https://www.google.ca/search?client=safari&rls=en&q=imac+flicker+and+dim&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=d-6dVMOkDsKFoQTO7oCoBg</a></p><p>or more specifically for your iMac model try:</p><p><a href="https://www.google.ca/search?client=safari&rls=en&q=27%22+iMac+i7+flicker+and+dim&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=Ku-dVJ-tAYXDoAS_uIHIDA" target="_blank">https://www.google.ca/search?client=safari&rls=en&q=27"+iMac+i7+flicker+and+dim&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=Ku-dVJ-tAYXDoAS_uIHIDA</a></p><p></p><p>But you could start with a PRAM and SMC resets and also try booting into Safe Boot Mode and see if either fixes your problem.</p></blockquote><p></p>
[QUOTE="pm-r, post: 1629962, member: 175845"] Lots of users have had similar problem if you want to check: [url]https://www.google.ca/search?client=safari&rls=en&q=imac+flicker+and+dim&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=d-6dVMOkDsKFoQTO7oCoBg[/url] or more specifically for your iMac model try: [url]https://www.google.ca/search?client=safari&rls=en&q=27%22+iMac+i7+flicker+and+dim&ie=UTF-8&oe=UTF-8&gfe_rd=cr&ei=Ku-dVJ-tAYXDoAS_uIHIDA[/url] But you could start with a PRAM and SMC resets and also try booting into Safe Boot Mode and see if either fixes your problem. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
My iMac Screen occasionally flickers and dims
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