Power on but no display

[Guselove]

Recently, my laptop has "no boot device found" issue and I decided to power it on after two days only to discover that the power was on but no display.

After pressing the power on button, the power on Led light (white) and that of the wireless network F10(orange) was on. There was also sound from the fan but no display. 

[WAWood]

@Guselove 

This issue is often due to a failing drive. So, let's check that first, because if it is failing, it would need to be replaced and there is no point then in doing anything else until we confirm that.

If your PC is new enough to support UEFI, you can use these steps to test the hard drive: http://support.hp.com/us-en/document/c00439024

If not, to check the drive you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu
3) Press the Function key for testing the hard drive (usually F2) and let it run.

[Guselove]

The drive passed the two drive test before it stop displaying 

[WAWood]

@Guselove 

OK, so the drive works -- but if you aren't able to boot into Windows, the display is going to shut down after the boot.

Are you saying you don't get any display, at any time?

[Guselove]

After testing the drive and it passed the test drive test, I powered off the laptop. 

After two days, I decided to install an operating system only to found out it is not displaying anymore till this moment