Can It Be Saved ?!?!?!

Hi guys!
I posted here a few times before and got an astronomical amount of responses within' the first couple of min. and i wanted to say thank you for that, but now i have another dilema. My broken PS2. I have little knowledge of fixing them, but i sure can play em' lol corny? ok i know. anyways is there anyone that can help me fix it please i can post all the pictures you need and am willing to tell ya any info needed thanks!
i've opened it a couple of times, and lost some of the screws, not that that matters (or does it? ) anyways, it was dropped a couple of times and i got disk read errors, then, (regretfully) i opened it up and toyed around... not really touching much but rather looking really. So i close the PS2 and plug it in, alas now it won't even turn on... NOOOOOO. any suggestions now? I can post pic's if you want, might take a lil' bit cause i'll have to open it though.

Guessing that you have the older fat ps2 maybe the little silver ribbon connecting the power switch and eject button to mother board is loose.