Back light but no image after picofly install

Hello, I installed an rp2040 on a Nintendo switch v1 and then I no longer had an image on the screen but I have the backlight, I did not disassemble the card or touch the lcd connect, I do not understand where the problem comes from… do you have an idea? On the other hand, if I put the switch on its dock on the TV, the image appears

Thanks d’avance

Rémi

Help please …. One idea ? …