Notebook Operating System and Recovery

Please can anyone help? It's been 3 days since my laptop died while I was away from home. I have exhausted all self-help options and can't phone an HP rep at the weekend. Furthermore, it seems you can't even create a case online unless you're a business customer.While I was away  my 3 mth- old laptop shut down immediately  after a blue screen appeared telling me to wait, it was trying to find/identify the error. The laptop had been OK before that.

Pressing the power button results in no response. The power lights are on, the battery light blinks. There is no noise and the screen remains black.

I tried the virtual agent and went through problem-solving steps and explored other hp solution pages. I cannot do a hard reset-nothing happens.

I tried restoring Bios with key press combination Windows+B and got message 'Bios Recovery Files not found, plug BIOS recovery usb flash drive' Then I tried Bios Recovery with a USB -the laptop makes a noise like it's powering on for 5 secs then stops, screen remains black and there is no noise. I tried starting with Windows Key+V and got message 'CMOS check sum is invalid. The CMOS will be reset to default configuration and will be rebooted...CMOS Reset (502) Enter-Reboot the system' When I press enter nothing happens.

I downloaded the Hardware diagnostic tool to usb and tried that-no response.However, I left the laptop on and about 1hr later saw there was a response 'Boot device not found. Please install an operating system on your hard disk. Hard disk (3F0) F2 Startup diagnostics'