diff --git a/sketches/doorbell-touch-esp32-32e/DisplayDriverGFX.cpp b/sketches/doorbell-touch-esp32-32e/DisplayDriverGFX.cpp
index 033931d..b46bc81 100644
--- a/sketches/doorbell-touch-esp32-32e/DisplayDriverGFX.cpp
+++ b/sketches/doorbell-touch-esp32-32e/DisplayDriverGFX.cpp
@@ -38,6 +38,7 @@ void Gfx::init() {
     return;
   }
   Serial.printf("[GFX] Display OK: %dx%d\n", SCREEN_WIDTH, SCREEN_HEIGHT);
+_gfx->fillScreen(0xF800); // RED TEST  delay(2000);  _gfx->fillScreen(0x07E0); // GREEN TEST  delay(2000);  _gfx->fillScreen(0x001F); // BLUE TEST  delay(2000);
 }
 
 void Gfx::setRotation(uint8_t r)  { if (_gfx) _gfx->setRotation(r); }