Hey Baljit,
Glad I could keep you from getting the wrong screen! You're right about the IC chip being a possible cause of the black screen. The Surface Studio 2 has chips handling the screen's power and display. If one goes bad the screen can go black even if everything else seems okay. If your device turns on works with another monitor and the main screen's touch still works it probably means there's an issue with the display driver or backlight IC. If you shine a light and can barely see the image the backlight probably isn't working which might be a faulty backlight IC. But if the screen is broken, doesn't respond at all or shows nothing even with a flashlight you might need a new screen.
I hope this answer is helpful, if you have further questions, feel free to reply back
Regards,
Marcelo