Hanging booting OS from USB or Internet Recovery

  BCBENNY 06:20 17 Jul 2018
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Apple MacBook Pro "Core i7" 2.5 15" Mid-2015 (DG) Specs Model# A1398 I have been IT tech for 30 years and work as an instructor at the local college. I worked for the school system before that for 15 years so I have a good handle on many apple fixes and work runarounds. But this one has stumped me. So I made up the USB of El Capitan and the Yosemite. Both do the same and boot to a certain stage and hang with the spinning apple logo but hang. After that if I leave it the computer goes to blank screen and hangs. I have also tried to recover from the internet via restore but stops right after it loads to the apple and hangs. I even changed the DNS on the Wi-Fi to Google encase it was a country issue. Funny thing is I can load Windows 10 edu from a external DVD and everything works but the video drivers and HDMI. I never seen this and next step is to try to make a DVD out of a Yosemite 10.10 and try to load that. Anyone ever seen this one before?

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