HUB75 P4 1/10 Matrix

[Powerdata44]

Hello,
This is my first time posting about this topic. I bought four HUB75 RGB outdoor matrix panels (P4, 1/10 scan) and connected them using an Adafruit RGB Matrix HAT Bonnet with a Raspberry Pi 3B+.

I installed the FPP firmware on the SD card for the Raspberry Pi and followed several YouTube tutorials. In the videos everything works for them, but I cannot get it working on my setup.

I have re-watched the tutorials many times and checked everything carefully. In the Raspberry Pi settings I configured a 2×2 grid and set the panel chains as shown in the videos. However, the panels still do not light up.

I also tried using a Raspberry Pi 5, but I have the same problem — the LED matrices still do not turn on.

Has anyone experienced this issue or knows what might be wrong with my setup?

Thank you.

[AAH]

I don't know what the current state of FPP is but the Pi5 may not work. Some features of FPP weren't working in FPP last I saw. 
Can you post screenshots of your FPP setup and and also photos of the rear of the panels showing the wiring of the IDC16 connector and also the model number of the panels.  

[Poporacer]

Some features of FPP weren't working in FPP last I saw.

And what features were those? As far as I know they were all working.

[Powerdata44]

 Here are two photos of my Matrix layout showing which socket the Raspberry Pi should be connected to (the IN port).

These Matrix are 64x32.

I'll upload a screenshot of my FPP settings later as well. Hopefully these photos help.

[AAH]

Some features of FPP weren't working in FPP last I saw.

And what features were those? As far as I know they were all working.

I can't find the post anywhere but I was reasonably sure that Dan Kulp had posted somewhere that there was still integration issues with panels on a Pi5 with FPP.

[tbone321]

How are you powering the panels?  You might want to take a screen shot of your FPP configuration for the panels.

[AAH]

Here are two photos of my Matrix layout showing which socket the Raspberry Pi should be connected to (the IN port).

These Matrix are 64x32.

I'll upload a screenshot of my FPP settings later as well. Hopefully these photos help.

The model number has information that says the panels aren't 64x32. 
P4-1921-80x40-10S-S2.0. P4 panel, 80 pixels x 40 pixels, 1/10th scan rate.

[Powerdata44]

Here are two photos of my Matrix layout showing which socket the Raspberry Pi should be connected to (the IN port).

These Matrix are 64x32.

I'll upload a screenshot of my FPP settings later as well. Hopefully these photos help.

The model number has information that says the panels aren't 64x32.
P4-1921-80x40-10S-S2.0. P4 panel, 80 pixels x 40 pixels, 1/10th scan rate.

Hmm, I said 64x32 because when I previously set up the matrices using Python on the Raspberry Pi (for a status board project) with some help from ChatGPT, the matrix details were set as 64x32. That's why it stuck in my mind.
At that time Python was controlling all four matrices and it worked fine. I just thought I would try using the same matrices with FPP after seeing some examples on YouTube.

[MikeKrebs]

You could just count the leds on one side and verify the number? Likely not the problem with nothing showing up on the panels though. However, the whole parameters of your panels could be the problem.

Have you tried doing just one panel?

[k6ccc]

Stupid question department.  Are you connecting to the correct port (input vs output) on the panels?