Password keyboard boot

theanalyst21

I have a dual boot Mint 19.3 Tricia with W10 using GRUB2 boot. If I boot into Mint with an external keyboard all is fine but without the external keyboard the laptop keyboard will not enter a valid password. The password box shows the asterisks so the keyboard is active but the system gives an error message of 'password not recognised' I am very experinced with Windows but Linux is a relatively new venture for me.