Lenovo Y510p laptop - How to get show up bios / windows installation screen on external monitor on b

[Thor]

Ola guys, I am back after quite some time !! I need some help

I have an old creaky Lenovo Y510p Laptop. The screen doesn't work anymore.
So I wanted to use my external monitors to work with this laptop.
While I am logged into windows using the laptop , the external monitor works just fine ( over HDMI) .
But if I wish to do a clean format / reinstall of windows or get to the BIOS, I can't get the video output to show up on the external monitor while I am inside BIOS ( I know I am in BIOS because I hit F2 during boot .. ) or the windows install screens.
Things which I have tried :

1. I have opened up the lcd panel holder and disconnected the ribbon of the lcd panel , still the bios doesn't show up on the external monitor on boot.
   
   
2. I have tried using the fn+f3 key on boot and pressing f2 key to get to bios. doesn't work. How do I get the laptop to recognize the external monitor on boot and get to bios ? Any help and guidance will be appreciated
   

 

[Thor]

Any idea guys ?


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[whitestar_999]

That is because your old laptop bios has too low resolution/refresh rate to support it over hdmi(faced a similar issue in past). Your only solution is to use vga/dvi &/or a old non-hd monitor.