I got this error when I try to start the system. I was able to boot the system a few times before but now all I get this error. (Boot device not found). I tried the tests and there is no problem. I also bought this laptop a week ago so I have no idea what is the reason.
You should not be having problems like this with a new PC!
You paid for free HP Tech Support as part of the warranty coverage, so you might as well make use of it.
While this PC is still under warranty, you should contact HP Customer Support directly to have them put you in touch with HP Technical Support to see what they can do about troubleshooting and repairing your machine remotely.
I did this recently and the HP Tech was able to remotely access my PC from the Internet to check out the problems.
If they are unable to fix your PC, then you need to explore what options you have to get it replaced under the warranty.