Emachines m6811 doesnt power on

Question

My laptop doesnt power nothing comes up when i hit the power button. I had started taking it apart and after taking all of thescrews out from the bottom of the casing i took out and reinserted the power button ribbon and tried and it worked. thought i had fixed it but not the case as after putting it back together it doesnt work again. It doesnt even show that its plugged into the ac adpater.