Hi there Pete and welcome
This means it is not finding the hard drive.
Can you remove the battery and power cable please then hold the power button down for 60 seconds then release.
Once done, connect the battery and power cable and power on the G6 and tell me if it then starts please.
Start the computer and as it is starting, keep tapping F10
Are you able to get into the setup?
ok, now choose Reset to Default, and Save this and then tell me if it starts please Pete
It is the hard drive or sata port on the motherboard that has faulted. Nearly always it is the hard drive that's crashed.
I am really sorry about this and you are going to have to return the G6 to have first the hard drive replaced to confirm its the issue, else the motherboard needs replacing as its one of these two. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you.
I am really sorry about this, and if you have problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service by clicking one of the stars at the top of the page, then submit, that would be greatly appreciated.