These parts are compatible with HP Pavilion dv6400 Entertainment Notebook PC series. If you are not sure if a part is compatible with your specific model, please check the link to the manufacturer's website provided in our part description, or contact us. If you would like our professionals to install the part for you for an additional $129, please fill out our online order form on service.ztronics.com and include a comment mentioning the part you'd like to purchase.