ESP32-S3 - black screen on GC9A01 display

Hey everyone. I'm very new to this and just following instructions right now, but I bought the device below:

And after some issues getting the thing to flash, I'm stuck with a backlight, but a blank screen. I've found similar topics regarding the TFT_eSPI library, and I'm 100% sure that the pinouts are represented correctly (accoding to the documentation) in user_setup.h

I'm currently using an example sketch that's just a colour test, but any display based sketch I upload has the same problem.

the device was loaded with a demo that worked when I first powered it up, so I'm not sure where the issue is. Like I said, there were problems beforehand getting the specs dialled in in the SDK, but the serial monitor is clear now, telling me that those issues have been overcome.

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