Chosen Solution
I recently followed the excellent guide on replacing the screen on my 2017 Retina Macbook Pro (A1707). When I powered the computer back on, I got a normal boot screen, but once OS X starts booting from the firmware, the display goes dark. I plugged in a monitor, and the display isn’t present in OS X. It works in firmware, though!Running diagnostics, I get an error: Reference Code VFD003 - there may be an issue with the display.I installed a brand new display that I bought on eBay. Has anyone ever seen this before? SMC and PRAM have been reset.
Sounds like the T-CON board which is that circuit board that is part of the display assembly is defective. Basically you need to exchange the display assembly as this one is bad. Your system offers different scan rates: 2880 by 1800 pixels (Retina); scaled resolutions: 1920 by 1200, 1680 by 1050, 1280 by 800, and 1024 by 640 pixels The systems firmware boots up under 1280 by 800, so you see the Apple icon and the loading thermometer, at the end of the loading your system will then switch to the higher retina scan rate 2880 by 1800. At this point the timing logic within the T-CON jumps to a higher rate which it can’t do as the logic is bad.
So I have a possible solution It could be the flex ribbon cable giving you issues. If you can, remove the screen from the logic board socket and spray some compressed air and plug it back in (Firmly)
