Always remember, no matter how expensive your screen is, there are people in the world creating better images on cheaper screens.
Tools don't make the tradesman.
You said your computer had a wifi connection problem ... but then you said you'd tried solutions that didn't involve your computer.
I really think you should buy a cheap wifi dongle.
Like this: https://www.amazon.com/Wireless-USB-WiFi-Adapter-PC/dp/B093FT3H7L/