4 beps hp and display.

Hello, i have a issue in my desk top hp z440.

when i wanna turn it on he start with 4 beeps , after that , i press again the power button, and he start working normally. sometimes, it takes more than 2 press on the power button to work. always the same problem. 

in short: press the button, 4 beeps, press the button again... till he work

Android / Chrome 104.0.0.0