Desktop video (VGA) signal intermittent

[JohnP16]

I have a 3 year old HP Pavillion desktop. The video signal cuts out intermittently, even after reboot, with nothing running. Display appears for a second or two, but then goes black again, sometimes long enough for monitor to go into power save, then signal returns. Monitor and VGA cable swapped out with another, with no change in symptoms. Any thoughts on what component might be bad, or going bad?

[praveenbv]

@JohnP16, Welcome to the HP Support Community!

Hardware failure or system instability can cause the computer to reboot automatically. 

The issue could be the RAM, Hard Drive, Power Supply, Graphic Card, or External devices: – or it could be an overheating or BIOS issue, that brings me to my question, do you have any overheating issues? and did you make any changes to the BIOS lately? 

While you respond to that, here's what you need to do: 

(HP doesn't support Ubuntu as of yet, hence I'd request you to troubleshoot only using the Windows OS) 

Step 1: Disable the automatic restart option to view error messages 

Errors might occur but not display with Automatic restart enabled. Disable this option to allow the computer to display error messages instead of restarting. 

• In Windows, search for and open View advanced system settings. 

• Click Settings in the Startup and Recovery section. 

• Remove the checkmark next to Automatically restart, and then click OK. 

• Restart the computer. 

The computer no longer restarts automatically when a problem occurs. Instead, a blue screen displays useful information. You can search for a resolution using the information in the error. 

FOR DETAILS & FURTHER INSTRUCTIONS, USE THIS LINK: CLICK HERE (SKIP TO STEP 3) 

Hope this helps! Keep me posted. 

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