Psn connecting sporadically if at all.

Hi all!

I've had this ps3 about 3 years now maybe more. Within the last handful of months I can almost never get it to connect to the psn. If it connects it's usually not for long. I know it's not the internet connection. I also have an xbox 360, ps4 and two conputers that have no issues. Its so bad I cant even use it to watch netflix. Is there some fix or part I'm missing it is my motherboard on the fasttrack with no return?

Thanks!

Joe