Screen issues after impact or liquid, pt 2
Wasn't sure if I should extend my previous question Screen issues after impact or liquid w/ another comment or adding an "Answer", but since this is specific to the repair, rather than diagnosis, maybe it's cleaner to start this new thread (but tell me if I'm wrong!).
Anyway, I rounded up an identical donor machine and moved its LCD panel over to replace the damaged one in my previous question. The seller stated that the screen was fine before the machine stopped working (liquid damage on donor MBP). However, when I connect it and fire up w/ the replacement panel, I get video but no backlight. As you'll recall from the previous thread, the backlight circuitry on the MacBook Pro itself seems intact, since the old broken LCD lights up just fine.
1. What do you recommend I check/test, in order of easiest first?
2. Could it be an EEE incompatibility somehow or some other incompatibility w/ the replacement screen (although both MBPs are base 2.2GHz 2015s)?
3. Should I try swapping LVDS cables too, since those appear to be fairly easy to change?
Thanks as always,
P.S. As an aside, if the LVDS cable is the same part from 2012 to 2015, how come the 2015 display panel is apparently only compatible w/ 2015 models, while the 2013s and 2014s can be interchanged? What's physically/electrically different? [My search would be much easier if 2013 or 2014 panels could be used!]
EDIT 10/19/17: Photo of the LCD connector on the panel's PCB. Sorry for the quality...was holding one iPhone as a flashlight and shooting through the extra-magnified part of a magnifying glass w/ another iPhone! Note the completely destroyed 1st pin (outermost)...
Is this a good question?