Liquid damage, post logic-board replacement, still doesn't boot
The MBP in question had a soda spill last September. Finally got the correct logic board and replaced it this afternoon. Plugged it in, let it charge for about 30 minutes and tried to boot. Optical drive did its thing (mechanical noises), it made the happy MBP booting up noise (known in my home as the WALL-E sound), and stopped there. The keyboard backlight works, and the LED at the front right corner is turning on and off slowly. I can see the screen is getting power; it's still black, but it's a "powered" black.
My question is, is there something else I should be doing? I have seen several references to a PRAM reset and a PMU reset, both of which were alluded to in situations similar to mine. How do I do these things and would they help?
I heard the sound and got excited. Now I'm down in the dumps again.
Is this a good question?