No display after monitor overclocking

Hi guys,
I was finding out how to maximize my laptop monitor refresh rate and, after researches and youtube videos, I came here and checked a guide on overclock the laptop monitor ( this one https://r.tapatalk.com/shareLink/to...&share_fid=33462&share_type=t&link_source=app).

I never seen or read about a single monitor braking after the overclock, so I think it's my fault (or my ignorance about computer idk). So I was following guide point after point by download and install both cpu graphics card driver and cru.I Reboot the pc, open cru and try to do what the guide saying. My laptop is a aorus x3v3 so my monitor is 60hz 3k (3200x1800), set the lcd standard mode on my res and install 3 profile of 65 70 and 75 Hz.
For 65 Hz the screen created some stripes.
I tried 70 Hz and the screen goes black but backlighted. So I pressed esc and everything turned ok. So I searches in the note of the topic and find about the pixel clock. The default set is 3200x1800 59,something Hz 347MHz of pixel clock. So I set a resolution of 1920x1080 with 200 MHz of pixel clock and the refresh rate was like 84, but I decide to not lower the pixel clock. Ok so I try it and goes black screen backlighted. So I press esc. Esc. Esc nothing happen and then I reboot the system with the hard button. The laptop seems to boot the fan blow air, the components gets hot and the keyboard backlight comes up. But the screen is screen of death. Black not backlighted.
I tried everything I know: connect to another monitor by hdmi but it says no signal, clean up the ram and the dual SSD m.2 drive, unplugged and replugged both the screen and the battery, try to insert my password for enter the desktop, praying God... But nothing.
So what I can try else? What am I doing wrong? Have I break something? Am I dumb?
Thank you for reading
http://cloud.tapatalk.com/s/5d9f0b1cb5bd5/20191010_123852.mp4

Inviato dal mio SM-G950F utilizzando Tapatalk

 

First thing is to be sure if it is a hardware or software issue. Remove the boot drive from the laptop with power off. See if when it boots a screen comes up as no boot drive available ( old ANSI screen).

 

Nothing. The screen remains black. Also the external screen doesn't do anything when I plugged it in

Inviato dal mio SM-G950F utilizzando Tapatalk

 

Is the laptop originally set to display to the external monitor when plugged in?

Edit; if from power on and already plugged in the monitor by default usually displays the same screen as the laptop.

 

Usually when I plug in an external monitor with hdmi cable automatically the screen comes up on the external monitor. But now it wont

Inviato dal mio SM-G950F utilizzando Tapatalk

 

It could be the GPU is stuck in a mode it can not use and is now a blank screen for everything. It also could be the graphics are fried as well but usually you should get some kind of error. Not sure if there is a way to clear the CMOS/UEFI of those systems.

 

Once I have clear the CMOS, what happens?

Inviato dal mio SM-G950F utilizzando Tapatalk

 

Once cmos is cleared it SHOULD reset the hardware so that the GPU at least boots showing the pre windows screens. if not then the laptop needs to go to the factory for repair most likely.

 

Try it yesterday and it worked! Thank you TANWare for your help

Inviato dal mio SM-G950F utilizzando Tapatalk