5 - 15 minutes
My machine was beginning to run slower and with Safari the petty beach ball was appearing a little too often before the web page would load. Then the screen pop panic appeared, all white with no possibility of booting to the desk top screen.
With some online research I stumbled upon the IFIXIT site and that was enough to give me the courage top attempt the repair myself. I also checked around with local Apple repair spots that quoted +$300 to fix with parts and labor. With the help of IFIXIT and a ton of savings I was able to get my machine up and running like th issue never happened.
The one very important piece of advice is that this fix was made that much easier because I use the Time Machine auto backup program with an external hard drive, I would highly reccomend that if you have an older machine that you make sure that you have back ups ! With that its super easy to restore.