diff --git a/src/helpers/ui/GxEPDDisplay.cpp b/src/helpers/ui/GxEPDDisplay.cpp
index a8ef757..07ccedf 100644
--- a/src/helpers/ui/GxEPDDisplay.cpp
+++ b/src/helpers/ui/GxEPDDisplay.cpp
@@ -52,7 +52,7 @@ bool GxEPDDisplay::begin() {
 
 void GxEPDDisplay::turnOn() {
   if (!_init) begin();
-#if defined(DISP_BACKLIGHT) && !defined(BACKLIGHT_BTN)
+#if defined(DISP_BACKLIGHT) && !defined(BACKLIGHT_BTN) && !defined(LilyGo_TDeck_Pro)
   digitalWrite(DISP_BACKLIGHT, HIGH);
 #elif defined(EXP_PIN_BACKLIGHT) && !defined(BACKLIGHT_BTN)
   expander.digitalWrite(EXP_PIN_BACKLIGHT, HIGH);
@@ -61,12 +61,17 @@ void GxEPDDisplay::turnOn() {
 }
 
 void GxEPDDisplay::turnOff() {
-#if defined(DISP_BACKLIGHT) && !defined(BACKLIGHT_BTN)
+#if defined(DISP_BACKLIGHT) && !defined(BACKLIGHT_BTN) && !defined(LilyGo_TDeck_Pro)
+  // Only toggle backlight on boards that actually have one.
+  // T-Deck Pro defines DISP_BACKLIGHT (GPIO 45) but has no physical backlight —
+  // setting _isOn=false would stop the render loop, making the device appear frozen.
   digitalWrite(DISP_BACKLIGHT, LOW);
+  _isOn = false;
 #elif defined(EXP_PIN_BACKLIGHT) && !defined(BACKLIGHT_BTN)
   expander.digitalWrite(EXP_PIN_BACKLIGHT, LOW);
-#endif
   _isOn = false;
+#endif
+  // T-Deck Pro: _isOn stays true — e-ink has no backlight, render loop must keep running
 }
 
 void GxEPDDisplay::clear() {