Strange colors no full screen with one color but different stipsc

Everything was working suddenly strange effect with colors.
Screen was showing full fill with one color but i dont know what happened .

At startup i show
gfx->fillScreen(RED);
delay(500);
gfx->fillScreen(GREEN);
delay(500);
gfx->fillScreen(BLUE);
delay(500);
gfx->fillScreen(BLACK);

but i see different color lines.

image