Not without any further information.
If you've forgotten all your details like password, email and date of birth used to create the account you are out of luck.
Otherwise contact Customer Support. The link is in the bottom left corner of any forum page.
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I need help signing in with my PlaystationNetwork Account.... i haven't signed in for years and now i want to change it and i can't since i'm unable to sign in.... can you help me?
I welcome this account to the forum! As it seems it is not your first
If you just want to sign in to change it you cannot. Your handle/gamer tag/name is locked and you cannot change it. If you just want to sign into it I agree with the previsous suggestion.
Or you could just use the account you posted with here to use on your PS3 as well. Good luck!