Computer will not turn off and all support options have not worked

[HMMMMMMMMMMMMMM]

the computer indictor light doesnt turn on no boot sounds and when conectd to monitors it dosnt show up

[Echo_Lake]

@HMMMMMMMMMMMMMM
Thank you for posting on the HP Support Community.

• Are you getting any error message or code?
• Did this happen after a recent window or software update?
• Have you tried any troubleshooting steps?

While you respond to that, let's try these steps: 

Hard Reset: 

1. Press and hold the power button on the“tower” of your desktop computer for 20 sec. 
   Note disconnect all connected USB, Keyboard and other wired/wireless device.
2. Connect the power cord and other devices to your computer and press the power button once again to turn it back on. 
   If the computer turns on, then continue the next step.

BIOS default: 

1. Turn off the computer and wait five seconds.
2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
4. Press F10 to Save and Exit.
5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
6. Follow the prompts to restart your computer.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.