diff --git a/ili9341.c b/ili9341.c
index 6986649..a2ef567 100644
--- a/ili9341.c
+++ b/ili9341.c
@@ -504,6 +504,12 @@ void lcd_setBrightness(uint16_t b){
 }
 #endif
 
+#ifdef __LCD_BRIGHTNESS__
+#define LCD_WAKE_UP_MS  120   // after sleep out the panel supplies settle, the backlight comes on after the init
+#else
+#define LCD_WAKE_UP_MS  2     // backlight not controlled: a longer wait only shows the uninitialised panel longer
+#endif
+
 void ili9341_init(void)
 {
   LCD_DC_DATA;
@@ -513,8 +519,8 @@ void ili9341_init(void)
   const uint8_t *p;
   for (p = LCD_INIT; *p; ) {
     send_command(p[0], p[1], &p[2]);
+    chThdSleepMilliseconds(p[0] == ILI9341_SLEEP_OUT ? LCD_WAKE_UP_MS : 2);
     p += 2 + p[1];
-    chThdSleepMilliseconds(2);
   }
 #ifdef TINYSA4
   if ((hwid % 100) >= 2) {
diff --git a/main.c b/main.c
index 0411551..fe79846 100644
--- a/main.c
+++ b/main.c
@@ -3550,9 +3550,6 @@ int main(void)
   adc_init();
   PULSE
   DAC->CR|= DAC_CR_EN1 | DAC_CR_EN2; // Use DAC: CH1 and CH2
-  #ifdef  __LCD_BRIGHTNESS__
-    lcd_setBrightness(DEFAULT_BRIGHTNESS);
-  #endif
   DAC->DHR12R1 = 0;                  // Setup DAC: CH1 value
 
   /*
@@ -3563,6 +3560,11 @@ int main(void)
 #endif
   ili9341_init();
   PULSE
+  #ifdef  __LCD_BRIGHTNESS__
+    // Backlight on only now the screen is cleared: a panel in reset or before its init
+    // shows white (the ZS405 panel, ZS406/ZS407 stay black)
+    lcd_setBrightness(DEFAULT_BRIGHTNESS);
+  #endif
 
 #ifdef TINYSA4
   ili9341_set_foreground(LCD_FG_COLOR);