diff --git a/box3_voice/main/idf_component.yml b/box3_voice/main/idf_component.yml
index ea4d95e..d501242 100644
--- a/box3_voice/main/idf_component.yml
+++ b/box3_voice/main/idf_component.yml
@@ -1,15 +1,10 @@
 dependencies:
-  espressif/esp-box:
+  # ESP32-S3-BOX-3 board support (ILI9341 LCD + GT911 touch). The original
+  # `espressif/esp-box` BSP targets the first-gen BOX (ST7789/TT21100) and
+  # leaves a BOX-3 screen black — this is the matching BSP.
+  espressif/esp-box-3:
     version: ">=1.2.0"
   espressif/esp-sr:
     version: ">=1.4.0"
-  espressif/esp_codec_dev:
-    # 1.3.x+ moved to driver_ng i2c, conflicting with esp-box 1.x legacy BSP.
-    # Pin to the last 1.2 release that still uses the legacy driver.
-    version: "1.2.0"
-  espressif/button:
-    # esp-box 1.x bsp uses the old button_config_t.custom_button_config API;
-    # button v3.x removed it. Pin to the last 2.x release for compat.
-    version: "~2.5.0"
   espressif/esp_websocket_client:
     version: ">=1.0.0"
diff --git a/box3_voice/main/plip_ui.c b/box3_voice/main/plip_ui.c
index 35b7e23..9b45b6d 100644
--- a/box3_voice/main/plip_ui.c
+++ b/box3_voice/main/plip_ui.c
@@ -9,7 +9,7 @@
 
 #include <string.h>
 
-#include "bsp/esp-box.h"
+#include "bsp/esp-bsp.h"
 #include "esp_log.h"
 #include "lvgl.h"
 
@@ -181,8 +181,14 @@ esp_err_t plip_ui_init(void)
         return ESP_FAIL;
     }
 
+    // The voice app starts the display but never lights the backlight — turn
+    // it on (and to full brightness) or the whole UI is invisible.
+    bsp_display_brightness_init();
+    bsp_display_brightness_set(100);
+
     lv_obj_t *scr = lv_screen_active();
-    lv_obj_set_style_bg_color(scr, lv_color_black(), 0);
+    lv_obj_set_style_bg_color(scr, lv_color_hex(0x101020), 0);
+    lv_obj_set_style_text_color(scr, lv_color_white(), 0);
 
     // Content area above the fixed bottom button.
     lv_obj_t *content = lv_obj_create(scr);