Screen work only on boot then goes off (sound is ok)

[linkref]

Hi,

I replaced my cartridge slot, and then when I tried to boot the switch, the screen goes off but only after the nintendo logo.
Backlight is still on,

Here's a video :



What i am suppose to check ?
Thanks


EDIT - I left it on like 5min and it's starts doing that



EDIT 2 -
Now controles does not work anymore, the power vol+ and vol- neither...
But if a touch the screen i can hear sound

Maybe a layer to check ?

 

[LuigiGad]

ignore the previous message, I misunderstood the section

 

[linkref]

Can you show me where are the points ?
I only replaced my cartridge slot, did not do any type of solder