The screen flickers but the computer will not turn on. There seems to be some melting inside the battery socket. Comes with 2 batteries but I think one of them might be dead the other one is new. Power cord included.

here is a link to repair this laptop:

https://www.ifixit.com/Document/i6otaAoCAWXgVxeE/Compaq-CQ56-Maintenance-and-Service-Guide.pdf

here is a link for more info about the laptop:

https://www.productindetail.com/pn/compaq-presario-cq56-200sa