Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
We definitely need to carry out a few repairs. To get a baseline of just how damaged the mac is.. I want you to try two simple steps.
Shut down your Mac.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.
Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
Once thats done, see if the mac will start.. If it will, we will still need to do some more repairs so please send a reply.
If it wont start, then try this next. With the mac completely shut down.
Press power, then immediately press and hold the shift key on the left side of your keyboard. Keep holding it down until you hear the startup chime.
Then, you can release it.
Will it boot this way?
Senior Technician and Network Switching Systems Operator / Maintainer.