Power light comes on but black screen and nothing else

[Bill_Balboa]

When TURNING ON MY PAVILION  ENTERTAINMENT  DV 9000  THE ON LIGHT COMES ON AS WELL AS THE FIRST LIGHT FRONT LEFT AND THE POWER CORD LIGHT AND NOTHING BUT A BLACK SCREEN AND NOTHING COMES ON. 

[Riddle_Decipher]

@Bill_Balboa Have you attempted to connect the device to an alternate power cord or adapter?

Or check with another wall outlet, excluding any surge protectors to check if it works?

While you respond to that, here's  the best way to resolve the issue, using the HP Guided Troubleshooter: 

CLICK HERE FOR STEP BY STEP GUIDE

(simply select your description of the issue from the bottom of the screen to gain access to the next set of steps that should resolve your concern).

If the above doesn't help or the steps are insufficient, check the below steps:

Let's start with a hard reset of your notebook computer before you try any other troubleshooting steps.

Reasons for a hard reset

A hard reset has the following effects:

• Clears the memory.

• Reestablishes the connection between the BIOS and the hardware

The following conditions can be helped by the hard reset:

• Windows stop responding.

• The display suddenly goes blank.

• The computer does not wake from sleep or hibernate modes.

• Software applications freeze or fail to respond.

FOR DETAILS & FURTHER INSTRUCTIONS, USE THIS LINK: CLICK HERE

(By the end of this article all the issues should be resolved)

P.S: Welcome to HP Community 😉

Let me know how that pans out,

If you feel I was helpful, simply click on Accept as Solution to help the community grow,

That said, I will have someone follow-up on this to ensure you've been helped,

Just in case you don't get back to us, 

have a good day, ahead.