Unable to show startup menu on VGA screen

  Olihatesyou 15:43 13 Jan 2017
Locked

So here is what is going on. My laptop's screen is broken, and I am using an external VGA screen. I wanted to force entering safe mode, and restarted. Now I can't see anything on the VGA screen. I disassembled the laptop last night in order to take out the video cables of its main screen hoping it would detect the VGA as the only screen and display everything there, but it didn't work. I tried pressing F8, then hit the up arrow in order to navigate to "launch windows normally", but when I hit enter, nothing happened. I've tried everything. Help?

Ps I have an HP pavilion g62

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