On Intel desktop boards, it is the F2 key that you need to use to enter BIOS setup.
Thanks for your reply.
But there is nothing happening. I tried all Function Keys and there is no response from the PC.
You probably need to clear and reinitialize CMOS and restore default in BIOS Setup. Unplug the system from the wall and remove the CR2032 battery for a half hour. Plug the battery back in and remove the BIOS jumper. Plug system into wall and press power button. Wait 10 seconds and then unplug the system from the wall again. Put the jumper back on the normal pins, plug the system into the wall and press the power button. Begin pressing the F2 key immediately and continue to do so until you get into BIOS Setup. Once in BIOS setup, press F9 to initialize the BIOS to defaults. Do a reboot then.
Hope this helps...