Please help! I have asus k52jt laptop. Last days wont work. My mb dont ever recognize graphic card in bios, but windows recognized. When I try to update driver for graphic on windows, then windows fall down and my screen going black. I connected my laptop with vga cable on second monitor and it work, but windows shows me video tdr problem (atikmpag.sys). When I start a bios, I seen ther is not graphic card any more. So I decided to update the bios, and it start works, but when bios completed update, it go to restart but it never power again. I removed cmos baterry, but it still wont to power on. Please help me!