Step 23 help please

at the end of step 23 the screen is meant to show flash loader. please dont turn of. but on my screen the message apperes for around a second before the screen becomes blank and nothing will load after. what is wrong?

Hey there,

Welcome to the forum and thank you for supporting MAKERbuino!

This means that the microcontroller cannot communicate with the SD card.
It’s usually caused by bad soldering joints or dust in the SD socket.

Can you please check your soldering joints on the SD socket and reinsert the card a few times? Also, please send us photos of your circuit board so that we can check your soldering joints.