I couldn't find the maintenance and service guide for your exact model.
Found the page for a 15-dy2000 model which I thought might use the same service guide
Go to p.50 to view the necessary pre-requisite steps and then the procedure to remove the display assembly. This should allow you to check the display cable to see if it damaged or just loose (either end).
If the cable is damaged where it passes through the hinge to get from the motherboard to the display assembly, there is a parts list on p.19 (item #6). Search online using the appropriate to your model part number only to get results for suppliers of the part. Usually the part number is also printed on the cable if you wish to verify which one you need.
Hopefully the service guide is applicable to your model as the only thing that HP shows for it is the product specifications and nothing else unlike other models it has.
If none of the part numbers match up to what yours is, search for "HP Partsurfer" and when the page opens (it must be off at the moment as it is not working) insert the "product number" in the search term on the page, to hopefully find your model and all the parts and part numbers.
Hopefully this is of some help.
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