Hi guys, sorry to bother.
From one moment to another my module began to fail, and my concern is that something has burned.
The fault is that the letters are barely distinguishable on the screen, it is hardly visible (I leave an image below) and it does not allow me to move in the other parameters, also the MDM does not recognize it.
I have almost zero knowledge of electronics, the only thing I dared to test is the 5v in the connector of the board and they are arriving well.
I found a post with a similar problem in THIS POST and the guy fixed it by re-soldering the screen connections...I think that's the case, but having no experience, I prefer to consult them before breaking something else.
It is a 32-input STM32F205RCT6 module that I bought already assembled by Dmitri a few years ago, it has been updated to the latest firmware some time ago, so I rule out that it is due to a bad update on my part.
Thank you very much for any suggestions that can help me.
Excuse my English, I use google translate.