i have the same questions！！！！
“Is there a way or a press button cheat where I can access the source button without tapping into the screen?”
My screen is completely unusable because a part on the circuit board inside is burned out (I took it apart and looked at it myself). But other buttons on the panel can be used normally. Replacing a screen costs $290+, so I’m wondering if I can directly connect it to the computer without using the screen until I see your question. It seems like it can’t be done? Do I have to tap the screen to connect to the computer?