Calibration & First run LCD blackout
Assembled the kit and performed "9. Calibration & First run | Turned it ON."
I inserted the USB and turned on the power.
The bootloader is displayed, and after a beeping sound, the LCD goes black.
Pressing the knob produces an electronic sound and the LED lights up, but the LCD remains completely black.
When observing the LCD, there are times when I can see the letters a little bit. There was one occasion where the characters were displayed properly, but after pressing the knob to move to the next screen, it blacked out.
I temporarily removed the LCD cable and reconnected it. However, there was no improvement.
I left it alone for a while, and the Prusa initial setup (Josef Prusa icon) appeared, but when I pressed the knob, it blacked out.
Where should I check?