Mac wouldn't boot up.
I have a Geeksquad subscription from Best buy.
they diagnosed the issue to a faulty drive cable.
Directed me to the ifxit website for the right part.
I ordered it, took it back to them and they repaired the Mac in a couple of days.
Now it works just as good as when i first bought it 5 years ago.
Thank you ifixit for having great parts.
Get a good diagnostic first and then find the right part... viola.....