LED doesn't work. What should i do?

First of all, thank you for the good products.
The assembly is complete and the others are perfect.
But only the LED doesn’t work.
Which part should I fix?
And is there a schematics of the makerphone?


Thank you very much for supporting this project!

What do you mean by LED doesn’t work? Just one LED, or all of them?

Did you pass through the setup wizard? Can you please send me a video where you’re trying LEDs (ex. trough the Flashlight app) so I can see it?

Schematics for the Ringo can be found here. You should be looking for the 2G version.

Keep in touch,

yes. Everything doesn’t work.
I also finished setup wizard and tried Flashlight app.
But it didn’t work.
i’ll try to send you a video but i’m not sure.

If every LED is not working then it is most likely a connection problem (bad solder joint or something).

Can you please take off the back of the phone and take a couple of pictures, especially of the main board.

Keep in touch, we’ll sort this one out!


I’ll attach pictures when I’m soldering.
The picture below shows you when the display is coming out.
I can’t take pictures of the current state because I’m at work.
But Nothing has changed in the picture below.
and i’m sorry. you have to zoom in on the detail.

Thank u : )

Hey Jung,

I have to compliment your soldering, it looks very neat from what I can see in the pictures! :smiley:

However, on some of the joints there seems to be too little of solder (ex. GPIO 22 and GPIO 23) from what I can see in the pictures. If you have any joints that have that amount of solder on them and if you think it could be improved, please do, since it can cause some of the functions not to work.

As you can see in our schematics here, the pin that is in control of the LEDs is pin number 12 (GPIO12 on the brain board). Please recheck this pin on both sides and make sure there aren’t any solder bridges anywhere on the board!

It all looks more or less okay, but I can’t be too sure over the picture and it’s always better to do some extra soldering just to make sure before we do anything else.

Keep in touch! :smiley:


Hi Robert.
At first, Thank you for your compliment and kind : )
I’ll try soldering again over the weekend and let you know the result.
Keep in touch and Thank u again!

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Hello Robert, it’s me again.
I double checked pin number 12 and other pins on this weekend.
I did some extra soldering more certain.
But LED still doesn’t work. :cry:
What else can i do?

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