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Hi nvrmore100, Thank you for the comment. Yes I did as you said it in EDIT4 but problem still here, If I connect DP then after boot laptop LCD shows blank screen, external monitor doesn`t receive signal and it seems that whole system is frozen. I tried RGB but first time resolution wasn`t satisfactory I tried to change it and now it doesnt work at all, I mean system sees external monitor but shows nothing on it. Any ideas, Console doesn`t show any problems or I cannot find any. Appreciate any help Thanks