Artifacts on screen

[Scottn84]

Hi All,

I purchased an omen obelisk gaming tower last week, when I 1st switch the tower on in carries out a series of beeps 3 long then 3 short. I thought nothing of it and switched the power off and restarted it, everything booted up fine.  Fast forward 4 days the beeping happened again so I switched off and switched back on and now the screen is full of horizontal lines/artifacts. 

[Lil_Boy_Blue]

Hi

At a guess...

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 (I/C): 1 For I/C, confirm if graphics is on processor or Main-Board. 2 For I/C where graphics is on the CPU, swap known good processor. 3 For I/C, replace Main-Board and/or processor as appropriate. If the add-in card requires additional power, verify the cord is plugged in. For non-integrated configuration (N-I/C😞 1 Reseat card if able. 2 Test known good card if able. 3 Replace affected component.

[Scottn84]

I bought the tower prebuilt so no option to remove and refit without invalidating the warranty. I contacted the seller and they have no more in stock. I am trying to contact HP direct but they must be closed for the day.