External display works, internal nothing (not even faint image)
I'm getting ready to order a new display, but wanted to clear up some final doubts before doing so.
The internal display comes up completely black, and as a computer tech, I've tried everything I could find (PRAM reset, SMC, physically unplugging battery and display cable and replugging after a couple minutes), etc.
Not even with a flashlight could you see any faint image on the internal display.
On the external display, the computer shows and works just fine.
I feel pretty confident that I just need to replace the display assembly, but before doing so, what are the chances that this could end up being logic board related, and my purchase ends up needing to be returned?
EDIT: This model is a 13". I found a couple cracked screens I still had lying around from previous repairs. I'm not sure exactly which macbook they came out of, but one was 13 and the other was 15. Both show up black when plugged into this machine. The 13" does seem to flash for a second, and does it again after it's been on for a little bit, but nothing else.
Is this a good question?