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Apple Computing Products:
macOS - Notebook Hardware
Screen corrupts during loading, freezes at blue login screen
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<blockquote data-quote="Collin Bl" data-source="post: 832653" data-attributes="member: 95994"><p>Have had this issue and here is the steps i followed;</p><p>First Step;</p><p>Start MacBookPro by pressing power button then holding down the Shift key (L or R)</p><p></p><p>it will take a bit longer to boot up but will not load any extra apps.</p><p></p><p>If that makes no difference to problem;</p><p></p><p>Start MacBookPro by pressing power button;</p><p>and hold down Command Option P and R buttons at same time and hold until you have heard the start chimes 3 times, then release all buttons and let it boot up.</p><p></p><p>Practice holding the 4 buttons first before pressing power button as it can be a bit of of a juggle.</p><p></p><p>If that does not sort issue;</p><p></p><p>Reset the SMC</p><p>Shutdown MacBookPro, remove power adaptor, remove battery and then hold the power on button down for 5 secs.</p><p>Refit battery connect power adaptor and boot up.</p><p>If all is go, do a Battery Calibration in very near future.</p><p></p><p>If that does not sort issue;</p><p></p><p>then find DVD that came with MacBookPro and press the power button and immediately insert the DVD and once it goes in Hold the D key down.</p><p>When it boots up hit return and then select which Hardware test you want to run, probably a good idea to do the extended test even though it may take an hour to an hour and a half to run through.</p><p></p><p>If that does not identify any issues then shutdown and restart holding down the C and it should boot up off of the DVD</p><p></p><p>If you are no further ahead then it is time to take it to an apple repairer.</p></blockquote><p></p>
[QUOTE="Collin Bl, post: 832653, member: 95994"] Have had this issue and here is the steps i followed; First Step; Start MacBookPro by pressing power button then holding down the Shift key (L or R) it will take a bit longer to boot up but will not load any extra apps. If that makes no difference to problem; Start MacBookPro by pressing power button; and hold down Command Option P and R buttons at same time and hold until you have heard the start chimes 3 times, then release all buttons and let it boot up. Practice holding the 4 buttons first before pressing power button as it can be a bit of of a juggle. If that does not sort issue; Reset the SMC Shutdown MacBookPro, remove power adaptor, remove battery and then hold the power on button down for 5 secs. Refit battery connect power adaptor and boot up. If all is go, do a Battery Calibration in very near future. If that does not sort issue; then find DVD that came with MacBookPro and press the power button and immediately insert the DVD and once it goes in Hold the D key down. When it boots up hit return and then select which Hardware test you want to run, probably a good idea to do the extended test even though it may take an hour to an hour and a half to run through. If that does not identify any issues then shutdown and restart holding down the C and it should boot up off of the DVD If you are no further ahead then it is time to take it to an apple repairer. [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
Screen corrupts during loading, freezes at blue login screen
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