Freezing screen at startup .. help !

[Waterproof]

Hello Gang,

After a few years of storage, my trustful M3 m (May be first generation) do not start up properly.

Instead it shows the M3 logo, than who’s that it start loading (red in the bar) and almost instantly blink and start again the processus (with a light « clic » sound.

Is it the SD card ?

Some idea ?

Thanks you all