Krzych Posted April 19, 2016 Share Posted April 19, 2016 Hello, I'm the new guy on the forum and I'm starting with a strange problem. I installed at the beginning firmware version 2.05 and I do not have an image on the display. I did everything according to the instructions on github.Then I tried several other versions of the firmware and other PC, and still the same effect. My specifications: Windows 7 32 bitSTM32F407G-DISC1 (no SD card)panels from Aliexpress (ONELED - Angela W.) power supply atx 20 A The image appears only for a milliseconds, when I turn off the power of panels, video below: https://youtu.be/o3eOasEKc4U Where is the problem? Greetings from Poland, Krzych Falik Link to comment Share on other sites More sharing options...
Content Provider lucky1 Posted April 19, 2016 Content Provider Share Posted April 19, 2016 When I pause at the moment when you turn off the device and the logo is displayed I can see that you either have swapped cables or you have the wrong panels (GRB). You can try to change the timing by increasing the brightness with the pin2dmd.exe Link to comment Share on other sites More sharing options...
Krzych Posted April 19, 2016 Author Share Posted April 19, 2016 Thank you for the quick reply. Wires checked several times, they are like a manual. However, it is possible that is a different pinout on the panels. I increased the brightness before, it is works, but only the brighter lines - logo does not appear. Which cables (signals) should be checked? How to recognize RGB or GRB panel is? Link to comment Share on other sites More sharing options...
Content Provider lucky1 Posted April 19, 2016 Content Provider Share Posted April 19, 2016 Pinout should be like this https://github.com/lucky01/PIN2DMD/blob/master/pcb/Wiring.md Please make closeup pictures of the connector on the panel Link to comment Share on other sites More sharing options...
Krzych Posted April 19, 2016 Author Share Posted April 19, 2016 That's what I have, but there is something wrong with the colors. I made a simple replacement of wires R> <G and colors are correct now - on the second, of course. Cables signals ABCD should be good, because the shape of the image is correct. CLK, STB, OE probably also good, correct me if I'm wrong.In a moment throw pic... Link to comment Share on other sites More sharing options...
Content Provider lucky1 Posted April 19, 2016 Content Provider Share Posted April 19, 2016 oe could be inverted. If you have the right color by swapping G-R you have the wrong panels. Link to comment Share on other sites More sharing options...
Krzych Posted April 19, 2016 Author Share Posted April 19, 2016 You're right, one line appears to look good (OE). The second info is not good, because I have to return the panel to China. Thank you for your attention, Krzych Link to comment Share on other sites More sharing options...
Krzych Posted April 27, 2016 Author Share Posted April 27, 2016 I experimented a little with the power supply and after removing the ground of the inverter's all started to work.I think the problem with ground potential. It's a bit strange, I have only the + 5 V connected to the power supply, but it works. Link to comment Share on other sites More sharing options...
smithjrj Posted May 5, 2016 Share Posted May 5, 2016 Krzych, did you find out anymore info on the grounding issue? My panel does the same thing as in your original post. No ground needed to power screen. My screen arrived yesterday from Angela (ONELED). Link to comment Share on other sites More sharing options...
Krzych Posted May 5, 2016 Author Share Posted May 5, 2016 I still do not know what's going on. P.S. When I supply from an external power source there is no image, does not matter the ground is connected or not. Link to comment Share on other sites More sharing options...
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