HP 19 All-in-One Screen Still Black

Hi, I have a problem with my PC and I need help to get it fixed ASAP! I've had it for a little over a year, I've taken very good care of it and it has never given me problems before now.
It was running, working normally, and I had left it for a little bit, long enough for it to go into sleep mode, and when I came back to it it was still running but the screen stayed black and would not come back on no matter what I did (move/click the mouse, push the sleep mode key, etc) so I tried restarting manually, the computer turned on and made all its usual noises but the screen stayed black and the mouse and keyboard didn't turn on/lights on them didn't light up, and this continued to happen every time I turned the computer off and back on.
Apparently this problem is more common than I expected but none of the supposed solutions worked for me. I tried resetting the BIOS using keyboard shortcuts as directed but that didn't work presumably because the keyboard isn't working. I tried unplugging my mouse and keyboard and plugging in different ones but those didn't turn on either. I tried doing a hard reset, and I either wasn't successful or I was and the problem is physical. I then tried taking the back cover off to see if I could find a problem inside but everything looked normal and nothing is loose (although it should be noted that i'm not super knowlegeable about computers)
I've tried leaving the computer on and waiting to see if the problem would fix itself and I've tried leaving the computer off overnight and not messing with it and nothing is working. I would like to know what the problem could possibly be and if I can fix it myself before I have to call someone or take it somewhere because I have a hard time talking on the phone and I do not have the funds to have my computer replaced or fixed by a professional.
Thanks!

Hello @skippyrip,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that your desktop computer's display is black when the computer powers on, and I would be happy to assist you in this matter!
To further diagnose this issue, I recommend following the steps in this document on Screen is Blank after Starting the Computer.
If the issue persists, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
I hope this helps!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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