[ubuntu] ubuntu installation

Hi,

Recently the motherboard of HCL 64bits laptop damaged and repaired thereafter. It was discovered that some nvidia chip has damaged. So the nvidia chip was replaced.
Now after repaire, the wi-fi is not recognised in ifconfig command.
For installing ubuntu, I have choose nomodeset boot option. But the F6 is not working after repaire.

Is there any way to choose nomodeset boot option without using F6?
I use usb to install.

Any help on wifi?

thank you...