PC problems. Any idea what this is...

[c7s34]

Hello, I bought a new HP computer which is nearly 4 weeks old.
Over the past couple of weeks when I have booted up the PC, when the HP sure start logo comes up, occasionally there have been white lines running through it, like interference lines, but this
only lasts about a second. Today, when I shut down the PC, the light didn't go off and the
PC fan was running abnormally loud and fast like a hairdryer. Sometimes a fan runs fast
when the disk is at 100%, but this was about three times louder and noiser than that.
I thought it was going to break down the noise it was making.

Does anyone have an idea of what this could be. I had to unplug the PC to make it stop.
I waited a while and switched it back on, and it seems to be OK now. Of course, how do
I know it's not going to happen again. If I send back the PC saying it's faulty,
they'll switch it on and it will appear fine. I do have a video showing the noise the
PC is making, would that be enough for the company to accept the return for a refund
even if this problem doesn't happen when they switch it on?

Regards,

 

[hang-the-9]

New system, contact vendor support or where you bought it from.