If it is still under warranty I'd send it in, at this point it sounds like a hardware issue.
I bought a Eurocom Shark sometime last winter. Ever since I bought it, the computer will randomly let off a strange beep at seemingly random intervals. The beep coincides with a slight stutter in video, and it happens whether I'm using onboard or dedicated graphics. I believe there's also a slight clicking noise, so I figured it might be my harddrive. If it were the harddrive, I assumed it would've failed by now.
My 1 year warranty is running out within the next few months, so I figured I'd see if anyone had any ideas why my computer does this. Would it be worth sending the computer into Eurocom to look at the problem? They haven't been very helpful thus far.
Thanks for your help.