G40 black screen and no bios

I was intending to downgrade my laptop to 8.1
Then I go to the bios and enable the legacy
After recording
All I have now is a black screen
(does not appear the lenovo logo)
And I can't enter bios mode or same recovery
I need help
Thanks in advance

Mod edit: your two previous posts have been deleted since this announcement contains the same information.

The problem is theres no bios or lenovo after power up
so a little to solve this problem by connecting another monitor
and go to the bios and redo the legacy
return to the uefi and clean install windows 8

Tags: Lenovo Notebooks

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