Hello,
The metal side of the ribbon is connected right. I am sure it is on the right side and connected right. My power supply is a 5V 3A. I have previously been able to connect the RPI4B to a display similar to yours, but had to change to the one you sell for space Reasons.
With kind regards

hello,
first of all sorry for my late reply, and thank you for your reply. i unfortunately cannot provide you with the kernel version of the system since i do not have a screen at the moment. i have one picture showing the connection on the RPI4B's side(disconnected to show the direction of the pins ...

Hi, my problem is that I bought the 7inch display with touchscreen, and each time I try to boot with it while having the DSI cable connected to the display port the raspberry pi 4 B won't read the SD card ( the green LED just won't flash). I know for sure that the problem isn't my raspberry pi since ...