Looks like I may have damaged the display (not a retina, btw) on my mid-2010 MBP 17. While diving in to clean up inside components, I failed to separate the display from the rest of the unit - opting instead to cover the keyboard portion of the top case with a micro-fiber cloth before closing the lid, turning the machine upside down, and going to work.
I removed everything including the kb, cleaned and replaced everything, then turned around and powered on, immediately noticing some cloudy patches on the lower part of the display that I do not recall seeing there before. The patches are visible when the machine is powered off, as well. So thinking I've been supremely careless here.
Additionally, the unit will no longer power on (after doing so initially) by using the power button. It does, however, power on after disconnecting, then reconnecting the battery cable from/to the logic board, then connecting the power supply, without pressing the power button. I have to repeat this procedure again to power back on if I shut down, though.
Feeling very ashamed right now as I am a long-time tech who seems to have forgotten to take some very basic precautions here.
Is there any hope, Obi-Wan?