I have a Raspberry Pi 3 model B running the latest version of Rasbian Stretch. Yesterday I've received my Waveshare 4,3 inch display. First thing I did was build it in my project, due to save height I've desoldered the connector because it's only for 5/3,3v GND and touch. I've soldered wires to the PI and installed all of the drives, and set up the config.txt like the example given. But I got an instant white screen, so backlight works but no info. However on a normal monitor there is info. And touch seems to work.
So I decided to install their distribution given on the CD which I've received with the screen. But same story, again no info on screen and with a monitor everything works.
I am quite sure I did everything I had to do: The RPi does output on HDMI, otherwise it wouldnt work with a monitor. The HDMI cable seems to be fine, otherwise it wouldn't work either. The touch screen works. All IC's recieve their 3,3 or 5 v input. I've installed all of the drivers.
How can I fix the blank white screen?