Adafruit/Elegoo TFTLCD white screen

Few months ago i bought an Elegoo TFTLCD on Amazon and it worked perfectly until this week. Two days ago it started to show just a white screen and to be not recognized by arduino. I thought it was broken so i bought another one screen with the same result. If i start the graphicstest i see the white screen and in the serial i see:

TFT LCD test
Using Adafruit 2.8" TFT Arduino Shield Pinout
TFT size is 240x320
Found ILI9341 LCD driver
Benchmark                Time (microseconds)
Screen fill              449684
Text                     275864
Lines                    2774188
Horiz/Vert Lines         63340
Rectangles (outline)     50572
Rectangles (filled)      1261896
Circles (filled)         812920
Circles (outline)        1205628
Triangles (outline)      880236
Triangles (filled)       1004088
Rounded rects (outline)  388072
Rounded rects (filled)   1578416
Done!

If i start the paint program i see just

Paint!
Unknown LCD driver chip: 0

How can i fix it?
thank you