Bad LED 32x62 Matrix?

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ZachPL
 
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Bad LED 32x62 Matrix?

Post by ZachPL »

Hi,

I bought a 64x32 RGB LED Matrix - 4mm pitch PID: 2278 in order number #2895583-9334366871 on August 2nd.

I had it fully up and running with the mlb-scoreboard-led project as I was hoping to give it as a gift for christmas, and I just turned it on for the first time in a month to update it to the lastest version to test before the mlb season is over and it appears the screen is now faulty. Top left quadrant is a different color than it should be with two lines on top and bottom. I tested with rotating colors and the mlb project and it happens on both.

Image

Image

Image

Thanks for any help.

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

Thank you for the photos.

Did you end up doing any software or firmware updates since this was last running?

What is the power supply you are using?

Were you powering the Pi from a separate supply?

https://learn.adafruit.com/adafruit-rgb ... aq-3055727

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

mikeysklar wrote: Sat Oct 01, 2022 3:37 pm Thank you for the photos.

Did you end up doing any software or firmware updates since this was last running?

What is the power supply you are using?

Were you powering the Pi from a separate supply?

https://learn.adafruit.com/adafruit-rgb ... aq-3055727
I did update the mlb-led-scoreboard project, but I ran these tests with the rgb matrix project and it happens with everything I run.

I'm using the recommended switching power supply, I wasn't powering the pi from a seperate supply but I just tried that and it is still doing the same thing

Image

Thanks

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

Your power supply looks good. I see you are using a 5v/4A.

Did your ribbon cable ends get swapped between the matrix and the hat? I ask because the examples in the guide show the ribbon going the other direction (same orientation as you have for pin1).

hatmatrix.jpg
hatmatrix.jpg (942.53 KiB) Viewed 153 times

Can you post a close up of the soldering on the HAT you have done. It looks reasonable from afar, but I'd like verify the flow is good up close.

What happens when you run the hzeller rgbmatrix demo code?

Code: Select all

sudo ./demo -D0 --led-rows=32 --led-cols=64

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

mikeysklar wrote: Sun Oct 02, 2022 4:26 pm Your power supply looks good. I see you are using a 5v/4A.

Did your ribbon cable ends get swapped between the matrix and the hat? I ask because the examples in the guide show the ribbon going the other direction (same orientation as you have for pin1).


hatmatrix.jpg


Can you post a close up of the soldering on the HAT you have done. It looks reasonable from afar, but I'd like verify the flow is good up close.

What happens when you run the hzeller rgbmatrix demo code?

Code: Select all

sudo ./demo -D0 --led-rows=32 --led-cols=64
Hard to get my camera to focus, but I think this shows it pretty good

Image

I switched the cable around just to see and the same thing was happening.

I tried the demo code it was changing so fast it was hard to get a good picture but the top left quadrant and then those 2 lines were still messed up.

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

The soldering is not bad, but some of the joins might need a tiny bit more flow. Can you remove the HAT and go over the joints one more time?

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

Sure I will soon and report back. Thanks.

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

mikeysklar wrote: Sun Oct 02, 2022 7:03 pm The soldering is not bad, but some of the joins might need a tiny bit more flow. Can you remove the HAT and go over the joints one more time?
Just reflowed and added some solder to every pin and same issue unfortunately.

Image

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

Thank you for going over the soldering.

Which model of Pi are you using? Pi 3 or Pi 4?

If it is a Pi 4 you might need add the slowdown.

Code: Select all

sudo ./demo -D0 --led-rows=32 --led-cols=64 --led-slowdown-gpio=4

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

mikeysklar wrote: Mon Oct 03, 2022 5:15 pm Thank you for going over the soldering.

Which model of Pi are you using? Pi 3 or Pi 4?

If it is a Pi 4 you might need add the slowdown.

Code: Select all

sudo ./demo -D0 --led-rows=32 --led-cols=64 --led-slowdown-gpio=4
It's a 3b+ I was already running the slowdown gpio with the mlb project as well (to cut down on flickering) and it doesnt make a difference

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

I see thank you for the clarification.

Here are the issues.

You are a month passed the 30-day warranty when opening this issue.

We don't know if the issue with the HAT, RGB Matrix, power supply or a software change.

This is a bad place to be. Do you have any thoughts on how to narrow things down? That you had a working configuration is reassuring.

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

I'm willing to purchase another, as I was thinking about making one of these for myself as well. If I buy one and this one works are we able to process an exchange still if it turns out this one is broken?

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

I think that could be a workable solution. Were you planning on getting another matrix hat + 32x64 display and 4A power supply?

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ZachPL
 
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Re: Bad LED 32x62 Matrix?

Post by ZachPL »

mikeysklar wrote: Tue Oct 04, 2022 3:21 pm I think that could be a workable solution. Were you planning on getting another matrix hat + 32x64 display and 4A power supply?
Yes I would need to purchase those aswell.

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mikeysklar
 
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Re: Bad LED 32x62 Matrix?

Post by mikeysklar »

Cool. Well lets move forward with this plan. I'll help you with any issues and the return process if something is faulty.

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