Using iGPU without graphic card and monitor..!

hi every body..
Newly I build a system..
i5 3570 k,
P8z77-vlx
Radeon HD 7870
But yesterday I get my graphic card to warrenty because of some problems..
Now it take a week for them to change my HD 7870 but now i want to use my computer without that..for some my simple works..
But when I attach my monitor to motherbord(hdmi,disub,dvi) it does'nt show any thing..
I mean that..like monitor is completly off..or no signal mode...
But i found that the system is up corectly..
I mean I found the OS is going up and...
How can I activate my iGPU in this situation?
I can't even access to bios..cause I don't see anything..
2 answers Last reply
More about using igpu graphic card monitor
  1. Dude delete this thread.we are answering you ques in your previos thread
  2. Yeah, we answered it in your other two posts. Duplicate!!!!
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