Did you test the screen before wiring this way? Did you test with 12V and 5V? I have not used this screen with a pi 3 before, so I am not sure the exact test pad to use for video. Make sure you are using the right one. Also, you need to have a properly imaged SD card for anything to display. I see an SD card in there so I assume it's good.Rowi wrote: ↑Tue Jun 25, 2019 10:15 amHi old threat but seems the experts are all here.
I wired everything - screen black. Pi boots normal.
Wired the button board for screen on the vga board -> Led on but screen still black.
Tired to change source but the screen just does not power on. The VGA Board has 5V and on the Controller Board for the Screen the 3,3V are also there.
We tried everything but it just does not cause any reaction by the screen. Any ideas?
You'll also use 5v not 3.3v. And make sure the ribbon cable is inserted properly. If you did not test and confirm it was working before hand, we have no way to tell if it ever worked in the first place. It may just be a bad screen that did not work from the start.
Also, FYI, the buttons board is not required to turn on the screen, once it detects a signal it should turn on.
You can also change the yellow wire to CVBS2 and see if it makes a difference.