DebianOn is an effort to document how to install, configure and use Debian on some specific hardware. Therefore potential buyers would know if that hardware is supported and owner would know how get the best out of that hardware.
The purpose is not to duplicate the Debian Official Documentation, but to document how to install Debian on some specific hardware.
If your model isn't listed above, you can create a new page. Name it something like "ModelName" as "C570" (it will be created under the current page):
Tuxmobil 's Linux on HP Installation Guides
Linux-on-laptops.com's Linux on HP Laptop Installation Guides