MacBook Air White Screen No Logo
Tried everything. Macbook air was working fine. Just updated to El Capitan then it wouldn't go to sleep (i.e. fan was on high even with the lid closed). I opened it back up, pressed the power button for afew seconds then got a message on a white screen that said "Device Restarted because of a problem..."
Tried restarting again, and have been getting a plain white screen with no logo. Initially there was no chime either. Then after resetting PRM got the chime.
Read one of the posts here so I removed the hard drive too. Reset SMC, tried pretty much everything. All I get is the white screen with chime no matter what I try. Unplugged battery, reseated the video cables, tried hooking up to exter screen/drive etc. Still nothing. Any troubleshooting help would be deeply appreciated
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