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Try to pull the tape cables and put them back in, it helped me, I had the same problem

I connected a 12V power supply and it works fine 😁

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as soon as I turn the 5V power on and off several times, a blurred image appears on the display and from time to time the image with PIN2DMD appears briefly

Ok, Thank you so much Lucky1 for your help

there is progress, the red led is on, there is nothing on the display

I tried several times, unfortunately still the same. 😕

ok i will try again Thank you

yes i do that is, something with the device is probably wrong

yes I used "UPGRADE", I downloaded the software from your link, unfortunately the problem is still there. Should the image "PIN2DMD" appear immediately after uploading the software?

Hi Lucky1 I don't know if it's soldering fault or something else, the software has loaded, but only led power is on . The voltage on the displays is (5V) Thank you

ok, thanks

I don't have a calculation, I did everything like in your guide.

Thanks

great job !!!!!!!!!!