Hi, My hp laptop Model 17-by0062cl will not start up

[iyougfohyp7]

Hi I shut down my laptop and when I went to start it a few day later it would not start.  When I push the power button  i can hear the hard drive spinning up and then a beep and it shuts off.  It will then keep trying to start over and over again until i hold the power button for about 15 seconds.  then it will stop.  No lights come on and the screen stays black.  I cannot remove the battery because it does not have one that can be removed.  I did not change anything to the system or load anything new.  I run a full time viruses scan protection and have not had any problems since i purchased the computer a year ago.  I unplug the unit and made sure everything was unplugged such as my mouse.  I checked and made sure there were no disks in the disk drive.  Now what should I do?

Thanks in advance 

Frank

[Lil_Boy_Blue]

Hi
First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat

AND/OR - Power on your PC, press Esc (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).
AND/OR
HOW DO I USE DIAGNOSTICS?

HP PC Hardware Diagnostics Windows is a Windows-based utility that allows you to run diagnostic tests to determine if the computer hardware is functioning properly. The tool runs within the Windows operating system in order to diagnose hardware failures. HP PC Hardware Diagnostics Windows comes pre-installed on new HP computers, but if not on yours, download here:- http://ftp.hp.com/pub/softpaq/sp93001-93500/sp93457.exe