Quick Background on my laptop
Laptop: Asus ROG Strix G - G531G
OS: Windows 10 Home 20HZ 19042.985
Processor Intel i7 9750H
Intel UHD 630 Graphics card and NVIDIA GeForce GTX 1650
Ram: 32GB
Motherboard: AsusTek Computer Inc: G531GT
BIOS Version/date: American Megatrends Inc. G531GT.307 - 4/28/2020

THE PROBLEM: (kind of long sorry)
my laptop's display sometimes doesn't turn on when I open the laptop. The backlit keyboard lights up and the fan is running so I know the computer is On, but the display isn't lighting up at all. Not just a BLACK lit screen but just off. It only really happened when I shut the laptop and some other posts suggested it was a "stuck in SLEEP mode" problem and that all I had to do was unplug my laptop, hold the power button for 60 seconds and then turn it on after. And that did work for a while until I noticed that sometimes even after 3 or 4 attempts at this "hard restart" the screen wouldn't turn on. I would have to leave my laptop alone for a while, at least a couple hours before I could try getting the screen to turn on.

Eventually the laptop screen just didn't turn on at all anymore and at this point, about a month later, I had access to a second monitor and tried plugging that into my laptop. The second monitor immediately lit up and displayed my windows login screen as my internal monitor would if it worked. I could use my laptop just fine as long as I had a second monitor. I believed this to be some hardware issue with the LCD or cable and sent it into the warranty company to be fixed claiming this issue and they sent it back saying they fixed some sort of sound issue instead with no mention of anything display wise. I opened the laptop and the display seemed to work fine at first, it turned on, but closing it and opening it again revealed that the problem still remained. I contacted the warranty company again, TOLD them the issue wasn't RESOLVED, that is was my display, sent it in, got it back, and this time they said they solved an issue where the OS couldn't boot to windows or desktop (something like that) but when I got it back the display issue still remained. It didn’t seem to be anysort of OS issue since I could still use my laptop normally as long as I had a second display.

They (warranty company) seemed to think that it was some kind of software problem, but the thing is my laptop OS can boot to windows. It works just fine with another monitor as I've said, so I didn't think that was the issue. I eventually decided to try and keep track of when my laptop screen went dark, for how many days it would stay dark or work, and document what software solutions I could try in the meantime to see if it was a software issue. So Overall I've noticed my laptop has 4 different "modes." The first is that I open the laptop and the internal monitor works fine, and would sometimes work fine for a couple of hours or days. The Second is the Laptop internal display doesn't turn on, but when I plug a second monitor in and look at the display settings, it shows the internal display and says "display 1 isn't active" and I can turn it on by clicking the extend screens OPTION in the settings. The Third is similar to the second except I can't turn the internal monitor on with extend screen option, it just won't. The fourth is that my laptop doesn't even detect an internal monitor. I check the display settings, the device manager but it only shows the second monitor I have plugged in. I've been unable to notice any sort of "trigger" for any specific mode, they seem to appear randomly, last randomly long and in general have no pattern I can recognize.

“FIXES” I’VE ALREADY TRIED AND DIDN’T WORK:
Setting my laptop to “do nothing” when I close the lid.
Turning off fast start up in windows
Turning off Windows automated driver updates to prevent it from messing with what's already installed.
Going to the manufacturers website to find the most recent driver updates and installing them
Going to previous drivers that came out before the issue started.
Updating windows
Going to the ASUS Website and installing the latest BIOS update
Having my laptop reset (multiple times)
Using the administrative command prompts to DISM /Online /Cleanup-Image /RestoreHealth and SFC /SCANNOW
“Reseating” my RAM

Some of these attempts, mostly the driver and windows updates, cause my computer to shift “modes” so like the internal monitor will turn on after reset or it won’t detect the internal monitor. I’ve checked and, no, it isn’t any specific driver or update that causes any specific mode. So far none of them have solved the issue. I haven’t tried any other hardware fixes quite yet because I’m not that confident with computers' internal hardware and don’t want to touch anything I don’t entirely understand.
Just to sum up the problem: the laptop internal screen with work fine as long as possible until I either close the screen or restart/ turn off then turn on again, the laptop in which case there is a change for the laptops screen to stay black and I need a second monitor to do anything

(adding this just in case it's important but sometimes when I check the task manager to see why the laptop is running so slow there’s a task called “system interrupts” using 100% of the CPU. It doesn’t seem to last long but its there.)

sorry for the long read :/
Any help is appreciated thanks