Please help !!! can't boot into the system after removing my graphic card!!

[fishredleung]

CPU : i5 3550
motherboard : msi z77-G45
graphic card: removed

i used to have a HD6850 installed but it had broken so i removed it, after that i can't boot into the system again, the error message is shown as below. I had tried everything i know ( add nullcpupowermanagement.kext, fake smc, ssdt,etc)please please help me!!!

 

[fishredleung]

Could somebody help me please

 

[P1LGRIM]

Could somebody help me please

Your integrated HD 2500 graphics do not work right 'out of the box', you need to do some tweaking.
HD 2500 was supported in some version of Mountain Lion but was removed in later versions.
Use the forum Search tool to find out what is required.