So You said that NOVO Key is unusefull as USB Port is broken ?
Let me understand please !
I saw You made all Bios Settings to use USB Boot and then NOVO key
not showed Menu ?
Regards
https://www.youtube.com/watch?v=6JnDbc8uOxw
https://www.youtube.com/watch?v=f_9_Fg6H0HI
http://www.lenovo.com/shop/americas/content/user_guides/g410_g510_ug_en.pdf
From a Forum Lenovo :
All you have to do is to set
Boot Mode = LEGACY
Boot Priority = LEGACY FIRST
USB boot = ENABLED
Be sure that your usb flash drive is listed as the first device to boot.
After setting these, insert your flash drive then save and exit.
The unit should now boot using your flash drive.
You may also want to create a UEFI or Legacy Bootable flash drive using Rufus go here :
http://tipsandtricksforum.com/thread-245.html
Prepare the USB Stick using RUFUS tool It make USB Stick Bootable !
Let me understand please !
I saw You made all Bios Settings to use USB Boot and then NOVO key
not showed Menu ?
Regards
https://www.youtube.com/watch?v=6JnDbc8uOxw
https://www.youtube.com/watch?v=f_9_Fg6H0HI
http://www.lenovo.com/shop/americas/content/user_guides/g410_g510_ug_en.pdf
From a Forum Lenovo :
All you have to do is to set
Boot Mode = LEGACY
Boot Priority = LEGACY FIRST
USB boot = ENABLED
Be sure that your usb flash drive is listed as the first device to boot.
After setting these, insert your flash drive then save and exit.
The unit should now boot using your flash drive.
You may also want to create a UEFI or Legacy Bootable flash drive using Rufus go here :
http://tipsandtricksforum.com/thread-245.html
Prepare the USB Stick using RUFUS tool It make USB Stick Bootable !
[size=undefined]Your Brain [/size]. . . . It's the best tool U can use ! 
[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
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[size=undefined]Don't FLASH the Bios Mod if You get a Size Alert, You risk a Brick !!! [/size]
Donate to me for my work, click here BDM