TM1637 4 digits not working

[forest sapphire]

Hello,

I'm trying to make my TM1637 4 digits working for A320 ATC.

I've already make a 737 pedestal with tm1637 but with 6 digits. I've already been annoyed by 4 digits so I've put a 6 digit and it work.

This time I really need to put a 4 digits but impossible to make it run. There is only 4 pins so it should be easy. But maybe the problem is the TM1637 himself so there is a link:
Je viens de trouver ça sur AliExpress :
2,30€ | Tube d'affichage numérique à 7 segments, carte technique LED à 4 chiffres pour Ardu37, rouge, vert, bleu, jaune, blanc, TM1637, 0.36 ", 0.36"
https://a.aliexpress.com/_ExlR93w

When I press test I have nothing. The working red led is ON at the back.

[tame galleon]

Hello, You should give us more details on your connections of the TM1637 and the declarations made in Mobiflight because I have these modules installed in a transponder and in a rudder trim and they work perfectly.

[forest sapphire]

Hello, thank for answer. About connections I have CLK to pin 38 and DIO to pin 39, I have GND to GND arduino and +5V to +5V on arduino. I have TM1637 working good but they are 6 digit. My 4 digit doesn't want to work

[forest sapphire]

I checked every connection as you can see

[forest sapphire]

problem solved, bad solder on arduino + 5v pin