HP2009m desktop black screen

Hello,
I really need help I turn on my computer normally and I enter my password and enter and a black screen comes on the screen and it doesn't go away I tried waiting a while and still nothing I tried everything leaving it off for a while restarting the computer everything but nothing works I really need help and the computer is a HP2009m by the way and I really need help can someone please tell me what to do I tried even searching for answers and nothing so I'm asking for help please help me and itd a computer NOT A LAPTOP please help me I would be so grateful and do anything thank you for your time
Sincerely, candy lover❤