I have an Alienware Area 51 R2 with i7-5960X. Service Tag# 95L9B42.
The system can boot up to Windows 8 fine. But during the entire boot process, I have no video output. The display comes back alive only after Windows 8 boots up completely.
I tried to hit F2, F10, Delete --- the boot sequence did halt, but since there is no video output, I am unable to access BIOS menu.
How do I resolve this?
A similar issue has happened in the past with Alienware Aurora's that had AMD/ATI graphics cards.
I may get this a little wrong, but I think it has something to do with what output connection you use.
For example, if you use a HDMI output you will miss the boot screen, but if you use a DVI output you will get the boot screen but no windows, like I said may get this a little wrong (as in which plug is which) but try some of the other connections and see if they display the bootup screen and BIOS
I have finally noticed why there were no video on POST. This is only my observation.
The Alienware Area 51 R2 machine that I am working with have 2 monster graphic cards and 4 DVI ports! I found only 1 DVI port will support POST video output. The rest of them have delayed activation, that's why I was able to see screen output after Windows 8 boot up completed.
This is important because no POST video means can not get into BIOS menu (F2). Unable to change boot sequence or other settings.
Hope this helps.