Hi Seanmosley1268,
The model number PCG-3J1L is the chassis number of the laptop. You may check the exact model of this unit on top of the keyboard or on the bezel of the screen. It usually starts with VGN or VPC.
Please refer to this link to help you troubleshoot the issue on your laptop. Make sure to read the instructions carefully before you proceed.
https://us.en.kb.sony.com/app/answers/detail/a_id/35585
Regards,
Jen
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