# Cannot get the panel to work correctly **URL:** \ **Category:** Uncategorized\ **Created:** [April 5, 2021, 5:10pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192 "2021-04-05T17:10:46Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![NioZero](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/niozero/32/81_2.png) [@NioZero](https://rpi-rgb-led-matrix.discourse.group/u/NioZero)\ **Post date:** [April 5, 2021, 5:10pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192/1 "2021-04-05T17:10:46Z")
Hi, I bough the following [LED Panels](https://www.amazon.com/gp/product/B07LFJD5GY/) with this [RGB Matrix](https://www.amazon.com/gp/product/B00SK69C6E/) and I’m trying to make it work in a Raspberry Pi 4. I compiled the demo without problem but I cannot make the image to show correctly and I think is something related with the parameters. I tried using `--led-rows=32 --led-cols=64 --led-gpio-mapping=adafruit-hat` but it shows as following ![IMG_20210405_130649330](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/494a6ef1b6d0069c76c0d8cfb80100204a6b35eb.jpeg) I also tried to play with `--led-chain` but doesn’t work either and I don’t know if I’m missing something. Any help will be appreciated. ---
**Author:** ![TegraPrime](https://avatars.discourse-cdn.com/v4/letter/t/2bfe46/32.png) [@TegraPrime](https://rpi-rgb-led-matrix.discourse.group/u/TegraPrime)\ **Post date:** [June 20, 2021, 7:16pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192/2 "2021-06-20T19:16:49Z")
I have the exact same panels, no hat/bonnet wired directly to the pi, and getting similar results. I also found some settings to try in the WiKi and still get the same results. ![16242165223278810703970291942735](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/e4c72200bd39080cd6d19adf8caffdc4ff377d17.jpeg) ---
**Author:** ![TegraPrime](https://avatars.discourse-cdn.com/v4/letter/t/2bfe46/32.png) [@TegraPrime](https://rpi-rgb-led-matrix.discourse.group/u/TegraPrime)\ **Post date:** [June 20, 2021, 7:20pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192/3 "2021-06-20T19:20:50Z")
other flags tried –led-panel-type:FM6126A –led-row-addr-type=3 –led-cols=32 –led-chain=2 –led-multiplexing=2 Still getting the same results. Motion demos do cause the leds to blink at times but thats it. ---
**Author:** ![TegraPrime](https://avatars.discourse-cdn.com/v4/letter/t/2bfe46/32.png) [@TegraPrime](https://rpi-rgb-led-matrix.discourse.group/u/TegraPrime)\ **Post date:** [June 20, 2021, 7:25pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192/4 "2021-06-20T19:25:29Z")
![16242170325363689996367288233857](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/fe0b45b55ee1cc8e40ca3fc65063dc3ebe04c8f9.jpeg) Back of my panel. ---
**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Post date:** [June 21, 2021, 6:27pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192/5 "2021-06-21T18:27:37Z")
wired directly means you logic level might be worng. Try powering your panel with 4.2V instead of 5V. Also if you have an rPi 4, you have to use --led-slowdown-gpio=2 ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 15, 2025, 12:20pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/cannot-get-the-panel-to-work-correctly/192/6 "2025-03-15T12:20:29Z")
@marcmerlin Thanks for ur post. Can you look this post please ? > [@RGB P4 Panel 64\*32 RPi RGB LED MATRIX](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/7): > > Hi, Someone have idea why i get this result ? Look the video with grayscale please link [http://kmeg.free.fr/VID\_20250312\_194116.mp4](http://kmeg.free.fr/VID_20250312_194116.mp4) Regards I use Panel P4 32 64 with rpi 3B and have some problem ! Regards