Alienware m11x r2 (Insyde H20)

[Darko]

Hi all,
i have a huge problem with my alienware m11x r2 with insyde h20 original bios version (unmodded) bios vers. A03
my display was totally broken and i bought a new TV with HDMI port to plug with it, and it was working fine, i hardware removed the display and ... cut the display wires
now when i puton the pc it beeps 8 times, googleing i noticed that 8 times mean vga/display issues, so i supposed to manage the bios setup and disable the integrated display, or maybe disable the startup-diagnostic tool, but i can't do this operations on original Insydeh20 bios.
i can enter bios, but can't boot OS (windows 7 64bit)
and ofc i work with external hdmi tv as monitor.

sers, please help me, i'm going crazy with that beeps ;S
thanks.