Suddenly shut down and strange sound

[Lily456]

My PC will suddenly shut down and the fan will produce a loud noise. I need to force it to power off, sometimes it will produce 3 long and 3 short beeps, and I have no idea what it means. 

When it works normally, it will never shut down properly, I have to keep pushing and hold the power button for a long time to shut it down. 

I checked the HP Support Assistant, there is nothing new for updating BIOS. 

[Paul_Tikkanen]

Hi:

3 long and 3 short beeps/blinks

According to the chart below, it appears your PC has a video problem of some kind.

HP Desktop PCs - Computer Does Not Start and Emits an LED or Beep Code | HP® Customer Support

Hardware

3.3

The embedded controller has timed out waiting for BIOS to return from graphics initialization.

Indicates potential graphics chip failure. For integrated configuration: For integrated configuration, confirm if graphics is on processor or system board. For integrated where graphics is on the CPU, swap known good processor. For integrated configuration, replace system board and/or processor as appropriate. If the add-in card requires additional power, verify the cord is plugged in. For non-integrated configuration: Reseat card if able. Test known good card if able. Replace affected component.