No Video Signal, No Power to Screen or apple logo on the back. Help!
My MacBook Pro recently decided to completely disable video signal and now there is no power to the screen or the logo on the back, no HDMI or Thunderbolt. The only way to view screen is via AirPlay or ScreenSharing.
1. My HDMI was showing no signal for the last few months, didn't bother me since I don't use HDMI.
2. When using screen sharing and AirPlay I can see my system is working perfectly, this tells me GPU is just fine.
3. There is no video output in HDMI, Thunderbolt and screen doesn't power up, this tells me it's not a screen, but something that detects video output and sends power and image to the screen.
PRAM and SMC resets, booting in safe mode, etc didn't give me any results. When hard drive is out, screen wouldn't power on anyways, so sounds like not a software issues. Can't run diagnostics because screen is off and I can't see any results.
There seemed to be a repair program by Apple until Dec 2016, but I didn't have issues back then.
System is a MacBook Pro Mid 2012 Retina 15"
Is there a specific part is most likely to be the culprit. Used logic boards are around $700 and I am not even sure if it will fix it.