Hello CDaveL,
I understand you are looking for a way to check your ink levels on your Officejet L7680.
There are a few ways to check them, I will post a link for you below that will help you. If your Solution Center is not opening, you can try running the installation again by using the download for your correct operating system. I will also include a link to the driver page for you, if you wish to download and run the installation again.
HP Officejet Pro L7680 All-in-One Printer Drivers
I hope this helps you!
Regards,