# P1.953 128x128 LED Matrix, no display or random display **URL:** \ **Category:** Uncategorized\ **Created:** [October 24, 2025, 3:19pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130 "2025-10-24T15:19:34Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![DenizOzaydin](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DenizOzaydin](https://rpi-rgb-led-matrix.discourse.group/u/DenizOzaydin)\ **Post date:** [October 24, 2025, 3:19pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/1 "2025-10-24T15:19:34Z")
Hello, I received a 128x128 panel from China a moment ago. Panel has several chips: DP32020A: for multiplexing (there are 32 of them) (Q1-16), (QA1-16) C84550P: I do not know the functionality (there are 96 of them) (UR1-32, UG1-32, UB1-32) 74HC245KAJ: there are not too much, 5 or 6 Standard HUB75 input with R1 G1 B1 GND R2 B2 G2 GND A B C GND CLK LAT OE GND When I set the cable configurations as following: (Raspberry Pi Zero 2W is connected to the power with a micro-usb, panel is connected to an adapter with 5V/30A, and ElectroDragon board is receiving power from raspberry pi with GPIO), and run the demo with parameters `sudo ./demo -D7 --led-no-hardware-pulse --led-rows=64 --led-cols=128 –led-parallel=2 --led-row-addr-type=4 --led-slowdown-gpio=0 --led-brightness=10 --led-multiplexing=0 --led-scan-mode=1`, there is no display at all. I also tried the multiplexing values between 0-20, and all possible –led-gpio-mapping settings. (the panel HUB75 port is connected to one of the three ports of HAT) However, when I cut the connection between ElectroDragon HAT and panel, run the demo and after I connect the HUB75 between HAT and panel, I get random noises as following: ![WhatsApp Image 2025-10-24 at 04.45.58_1dac7b0b](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/a4a159457a4d80ee4f80802ea562b5a26fb3468b.jpeg) and whichever demo I run, I get the same results. Also, –led-brightness option is not changing the brightness. I am sure that there are ground connections. What can be the issue? ---
**Author:** ![DenizOzaydin](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DenizOzaydin](https://rpi-rgb-led-matrix.discourse.group/u/DenizOzaydin)\ **Post date:** [October 24, 2025, 7:31pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/2 "2025-10-24T19:31:17Z")
Note, the random noises occur when also Raspberry Pi is not connected to the HAT or HUB75. ---
**Author:** ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707)\ **Post date:** [October 25, 2025, 9:16pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/3 "2025-10-25T21:16:30Z")
> [@DenizOzaydin](#): > > What can be the issue? Incompatible driver C8455qp ---
**Author:** ![DenizOzaydin](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DenizOzaydin](https://rpi-rgb-led-matrix.discourse.group/u/DenizOzaydin)\ **Post date:** [October 25, 2025, 11:31pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/4 "2025-10-25T23:31:24Z")
Any controller and library for driving the LED? ---
**Author:** ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707)\ **Post date:** [October 25, 2025, 11:56pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/5 "2025-10-25T23:56:35Z")
I found nothing about this driver in the net; so I can’t advice. Could you show the photo of the panel rear side (without cover, if any). ---
**Author:** ![DenizOzaydin](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DenizOzaydin](https://rpi-rgb-led-matrix.discourse.group/u/DenizOzaydin)\ **Post date:** [October 26, 2025, 12:21am UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/6 "2025-10-26T00:21:33Z")
![WhatsApp Image 2025-10-26 at 03.21.00_c68c6188](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/0ec49004c6fec1b08b5203cad6c19f6f96b626ae.jpeg) ![WhatsApp Image 2025-10-26 at 03.18.10_fb558b62](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/f4811c773082447a4195b816bd835889c424d991.jpeg) ---
**Author:** ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707)\ **Post date:** [October 26, 2025, 12:38am UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/7 "2025-10-26T00:38:36Z")
Thanks. Unfortunately, the picture helps nothing in order to fix the issue. Some of the options you used looks strange for me: 1. > [@DenizOzaydin](#): > > –led-rows=64 --led-cols=128 Why not 128 by 128? 1. > [@DenizOzaydin](#): > > –led-parallel=2 Do you really have a two parallel matrix chains? 3 > [@DenizOzaydin](#): > > –led-row-addr-type=4 it should be type 5 But to be honest, I don’t think changing the options will help launch the panel. ---
**Author:** ![DenizOzaydin](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DenizOzaydin](https://rpi-rgb-led-matrix.discourse.group/u/DenizOzaydin)\ **Post date:** [October 26, 2025, 12:50am UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130/8 "2025-10-26T00:50:45Z")
Yes, you’re right. I used –led-rows=64 because the demo is not supporting parameter “128” for –led-rows, and to compensate that, I added –led-parallel=2 but it is actually one single panel with 128x128 resolution. I could not find any information about the chipset C8455QP, too. I hope they are compatible with PxMatrix library or ESP32-HUB75-MatrixPanel-DMA with ESP32, but I don’t think so. Very thanks for your help.