My PC won't turn on at all just blank screen and makes loud beeping noises

[Hipp0]

I get a blank screen and four loud beeps and three short beeps but then I keep pressing the escape key repeatedly and it gives me an error saying "unsupported adapter installed" I tried doing a system test by pressing f2 it tells me that everything passed after I shut it down it still makes the same beeps

[Echo_Lake]

@Hipp0
Let's perform Microsoft system restore and check, 
System Restore returns your computer to the files and settings from the restore point. Your personal files and documents are not affected.

1. Turn off the computer and wait at least 5 seconds with the computer in a full off state.

2. Turn on the computer and repeatedly press the F11 key, about once every second, until you see the Windows loading screen.

3. If a language selection screen opens, select the language you want to use to continue.

4. On the Choose your keyboard layout screen, select the keyboard layout that matches your keyboard type.

   

5. On the Choose an option screen, click Troubleshoot.

   

6. On the Troubleshoot screen, click Advanced Options.

   

7. On the Advanced options screen, click System Restore.

   

8. Click Windows 8, click Windows 8.1, or click Windows 10 as the target operating system.

   

   The System Restore window opens.

9. Click Next.

   

10. Click the Restore Point that you want to use, and then click Next.

    The Confirm Restore Point window opens.

11. Click Finish to restore your computer to a previous point.

    

12. Do not interrupt System Restore when it starts. Doing so can corrupt your hard drive and create more problems. Click Yes in the warning that appears.

    

13. System Restore returns the computer configuration to a previous point in time and restarts.

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.

[Hipp0]

It says I don't have a restore system file 

[Riddle_Decipher]

@Hipp0 I'm writing on behalf of @Echo_Lake as the tech's out for the day,

And I suggest you move ahead with performing a system reset as you've exhausted all other steps to resolve the issue:

Click here for steps

If that doesn't work, please make use of the HP Recovery Media to reinstall the OS to factory defaults: Click here for details.

I hope that answers your query,  

If it did, simply select "Accept as solution", to help the community grow, 

And if you wish to thank us for our efforts, click on the thumbs up for kudos.

Have a great day ahead.

[Hipp0]

My PC doesn't support windows recovery environment

[Riddle_Decipher]

@Hipp0 In that case, I suggest you order a recovery media and use that to install the OS on your device: Click here for details on how to obtain one for yourself

[Hipp0]

Update: i finally managed to fix the computer all it was because I had the wrong power cord for it 

[KrazyToad]

@Hipp0

I'm glad you got this issue sorted out

Do visit our HP Support Community and drop us a message anytime you need help

Thank you 😊