hello all, I would like to that you guys in advance for any information you can provide. I have a late 2011 mbp 2.8ghz model number : a1278 that will not power on. Before this happened, I decided to replace the Lcd screen. I followed the given instructions and completed the replacement but now it won't turn on. When i press the power button ( with the charger plugged in) the fan and the sleep indicator light turns on and off intermittently. ( with charger unplugged) the fan and light turns on and off once. The batt. Indicator light shows full green. I've also tried resetting the smc, pram and The "temporary bypass" by Dadioh In another post on this forum but it still did not work. If anyone can help, I would greatly appreciate it!