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Dell Latitude E7240 Installing High Sierra


jadam188

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Hi Jake, when I enable legacy boot roms the system doesn't boot anymore. So the issue still persists, the screen still has the line effect, the only way I can temporarily resolve the issue is when I close the lid for 3-5 seconds and reopening it then the lines go away until next Reboot when I then need to repeat the same process with the lid. Thank you

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Hi Jake, got the usb to boot cheers for the advice however another issue has occurred, upon booting and loading the installer I'm greeted my a page with lines running through. I've attached an image of what I'm seeing.

 

Hi,

 

I make my way up to exactly the same point und ran crazy by troubleshooting.

 

In one situation I managed finally to install Sierra without IntelHD-GFX and activated remotedesktop for further inspections. I "repaired" the gfx patches, logged in from another mac and saw successfully loaded intelhd-kext!? 

 

The next thing I recognized, was that closing the lid and open it after some seconds to force the screen to sleep, I got a clear desktop :)

 

Now I stuck with faulty energy savings, missing audio and shutdown crashes - some more things to fix on my side...

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