I have assembled pc with P4 2.8 HT, Intel 865GBF board, Nvidia Geforce MX 4000 graphics card with WinXP and Win2003 Server. I have LG GCC 4521B combo drive which currently failed. Recently I tried to update the driver of combo. After that this problem starts. Both OS can't detect and BIOS also. It does not power ON. What is the problem and appropriate solution. Pls help me.