someitalian123 Posted June 30, 2016 Share Posted June 30, 2016 Hello I've decided to try my hand at installing OS X on my E6420 for the 2nd time. I just installed El Capitan 10.11.5 using Jake Lo's guide. Everything appears to be fully functional except for one thing, my laptop monitor will always turn off during boot. The system is running fine in the background but my monitor just turns off for whatever reason. Unplugging and repluging the charger is my current work around. This works when have access to a wall outlet, but otherwise I am stuck with the monitor off. I am using the e6420 bootpack with the DSDT-LowRes.aml as my display's resolution is 1366x768. Also I do not have optimus on my laptop. Link to comment Share on other sites More sharing options...
Administrators Hervé Posted June 30, 2016 Administrators Share Posted June 30, 2016 Which BIOS version are you running on your E6420? Could you post a copy of the raw/extracted DSDT so that we compare it with the patched one you're using? Link to comment Share on other sites More sharing options...
someitalian123 Posted June 30, 2016 Author Share Posted June 30, 2016 My E6420 is using bios revision A22. Here is my extracted DSDT. DSDT.aml.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted July 1, 2016 Moderators Share Posted July 1, 2016 Patched your file. Rename it to DSDT.aml E6420_biosA22.aml.zip 2 Link to comment Share on other sites More sharing options...
someitalian123 Posted July 1, 2016 Author Share Posted July 1, 2016 It appears to have worked, I should probably test it a bit more to be sure. But it seems to work, thank you. Link to comment Share on other sites More sharing options...
Mister3000 Posted November 3, 2016 Share Posted November 3, 2016 Hello, i also have an issue in which 7 times out of 10 when the computer boots the screen turns off after the apple logo and it goes straight in to sleep mode. once sleeping i can press the power button and the computer works. if i hit keys when the computer is coming up to prevent sleep the monitor will stay shut off while i hear the keys being pressed. I tried unplugging the ac charger and the monitor comes up but then it goes off again. Do i have to do something as well to my DSDT file like in the previous post? i am using the boot pack from this site on my: dell e6420 BIOS A21 intel i7 2.8 1600x900 graphics thanks i have attached my EFI folder in case needed. EFI.zip Link to comment Share on other sites More sharing options...
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