Got an error while playing with PS3

Dear Experts,
I tried playing with an unearthed and old PS3 when I got this error message. I searched the internet and learned that it was an old error and not sure if it was resolved. I got tired of searching for solutions so I turned to this forum hoping that an expert would help me fix the problem.
Please help. Thanks in advance.

An error has occurred. You have been signed out of PlayStation®Network.
(8001050F)
