Monitor display no signal and then goes to Sleep when turns on

[AliMoji]

Since five days ago the monitor been going to sleep while the hard drive (is that What it's called) runs. When it turns on it says no signal and automatically goes to sleep. I've tried pressing the keys and clicking the mouse but it doesn't respond to me.  It doesn't let me to anything. Please any suggestions or ideas on whats wrong with it and how to fix it.

[sandytechy20]

@AliMoji

Welcome to the HP Forums, this is a great location to get assistance! I read your post and see that you are getting no boot issues on printer and display shows no signal. I would like to help you resolve this issue. 

However, I will need a few details to provide an accurate solution,

• When did this issue start?
• Did you do any hardware or software changes?

Meanwhile

Perform a hard reset

1. Turn off the computer.

2. Disconnect all peripheral devices and remove all USB devices and media cards.

3. Disconnect the AC power adapter.

4. Press and hold the power button for at least 15 seconds.

5. Reconnect the AC power adapter.

6. Turn on the computer.

Reset the BIOS when the computer screen is blank

1. Turn on the computer and repeatedly press the F10 key for eight seconds.

2. Press the Down arrow three times.

3. Press the Enter key two times.

4. The computer restarts.

Click here and refer the document for more assistance.

Let me know how it goes.

Cheers.

[AliMoji]

It didn't work.  I haven't change anything from the computer to react like this. Just one day It kicked me off and went to sleep. Why is it acting like this?