I have disabled intel onboard graphics too in my gl553vd, my identification is almost 2 weeks and now after recovered from wrong bios flash, i know something weird case that my laptop running in old windows 10 rs2 1703 with CSM ENABLED only intel hd version 24.20.100.6025 has work with CSM ENABLED to use hotkey FN+ F4, F5 to adjust the brightness after installing this intel graphics. BUT, the good info is hdmi output is working showing my screen from bios on CSM mode, BUT cannot boot to windows 10 menu, just BLANKING SCREEN same as in the monitor is not showing anything just BLANK, BUT, the hotkey’s is working only brightness setting and monitor disable enable setting in my laptops has (BLANKING SCREEN POSITION) :
FN+ F5+F6 to adjust brightness
FN + F7 to disable enable lcd screen.
FN + F8 to disable enable monitor’s.
And any hotkey’s does not working (ex: my rgb hotkey FN+F4, F5).
Is Anyone know what is my problem is GOP error or VBIOS error???
Let me know if you can help me solved this.
Thanks in advance!!