Creality Ender 3 V3 SE does not start

Hello

My Creality Ender 3 V3 SE was working fine until this morning.

Now when I turn the power on, the screen only displays the background image but the usual menu does not appear.

It does not seem to me that anything particular happened. I reinstalled the firmware but the issue still occurs.

I switched off/on the printer this morning and now it works again. It’s strange because I used to restart it a lot yesterday. I hope it does not happens again

Is there a way to get troubleshooting information on a device that does not boot ?