so last night I opened up my mac and reset the PMU, I held the button and released it right away (am I supposed to hold it down longer?) Anyway, I plugged everything back in and it still wouldn't turn on. Quick question, by replacing the battery will it necessarily get the computer to turn on or am I looking at a failed PSU? p.s. i originally posted this on my older thread, i figure i should start a new one with this, thanks!