diff --git a/radio/src/CMakeLists.txt b/radio/src/CMakeLists.txt
index 962673616..186263aa4 100644
--- a/radio/src/CMakeLists.txt
+++ b/radio/src/CMakeLists.txt
@@ -265,7 +265,7 @@ elseif(PCB STREQUAL SKY9X OR PCB STREQUAL 9XRPRO OR PCB STREQUAL AR9X)
   add_definitions(-DEEPROM_VARIANT=0)
   set(GUI_SRC ${GUI_SRC} ${9X_GUI_SRC} menu_general_hardware.cpp view_telemetry.cpp view_text.cpp view_about.cpp)
   set(FIRMWARE_TARGET_SRC ${FIRMWARE_TARGET_SRC} core_cm3.c board_lowlevel.c crt.c vectors_sam3s.c)
-  set(FIRMWARE_TARGET_SRC ${FIRMWARE_TARGET_SRC} lcd_driver.cpp
+  set(FIRMWARE_TARGET_SRC ${FIRMWARE_TARGET_SRC} lcd_driver.cpp pwr_driver.cpp
     usb/device/core/USBD_UDP.c usb/device/core/USBDDriver.c
     usb/device/massstorage/MSDDriver.c usb/device/massstorage/MSDDStateMachine.c usb/device/massstorage/MSDLun.c
     usb/device/massstorage/MSDDriverDescriptors.c usb/device/massstorage/SBCMethods.c usb/common/core/USBEndpointDescriptor.c
@@ -278,7 +278,6 @@ elseif(PCB STREQUAL SKY9X OR PCB STREQUAL 9XRPRO OR PCB STREQUAL AR9X)
     board_sky9x.cpp
     telemetry_driver.cpp
     serial2_driver.cpp
-    pwr_driver.cpp
     adc_driver.cpp
     eeprom_driver.cpp
     pulses_driver.cpp
diff --git a/radio/src/targets/simu/simpgmspace.cpp b/radio/src/targets/simu/simpgmspace.cpp
index e0b5e8b51..8802d2c92 100644
--- a/radio/src/targets/simu/simpgmspace.cpp
+++ b/radio/src/targets/simu/simpgmspace.cpp
@@ -1310,15 +1310,18 @@ int lcdRestoreBackupBuffer()
 }
 #endif
 
-#if defined(PWR_BUTTON_DELAY)
-uint32_t pwrPressed() { return false; }
-#elif defined(PCBTARANIS) || defined(PCBFLAMENCO) || defined(PCBHORUS)
+uint32_t pwroffPressed() { return false; }
+
+#if defined(CPUARM) && !defined(PWR_BUTTON_DELAY)
 uint32_t pwrCheck() { return true; }
 #endif
 
+#if defined(CPUARM)
+void pwrOff() { }
+#endif
+
 #if defined(CPUSTM32)
 void pwrInit() { }
-void pwrOff() { }
 int usbPlugged() { return false; }
 void USART_DeInit(USART_TypeDef* ) { }
 ErrorStatus RTC_SetTime(uint32_t RTC_Format, RTC_TimeTypeDef* RTC_TimeStruct) { return SUCCESS; }
diff --git a/radio/src/targets/sky9x/board_sky9x.h b/radio/src/targets/sky9x/board_sky9x.h
index 258cde686..085ad9c3f 100644
--- a/radio/src/targets/sky9x/board_sky9x.h
+++ b/radio/src/targets/sky9x/board_sky9x.h
@@ -264,6 +264,7 @@ void btPushByte(uint8_t data);
 void pwrInit();
 void pwrOff();
 uint32_t pwrCheck();
+uint32_t pwroffPressed();
 #define UNEXPECTED_SHUTDOWN()          (g_eeGeneral.unexpectedShutdown)
 
 // EEPROM driver
diff --git a/radio/src/targets/sky9x/pwr_driver.cpp b/radio/src/targets/sky9x/pwr_driver.cpp
index 60d3f4f00..268ed2f92 100644
--- a/radio/src/targets/sky9x/pwr_driver.cpp
+++ b/radio/src/targets/sky9x/pwr_driver.cpp
@@ -1,24 +1,33 @@
-/*
- * Copyright (C) OpenTX
- *
- * Based on code named
- *   th9x - http://code.google.com/p/th9x 
- *   er9x - http://code.google.com/p/er9x
- *   gruvin9x - http://code.google.com/p/gruvin9x
- *
- * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include "../../opentx.h"
+/*
+ * Copyright (C) OpenTX
+ *
+ * Based on code named
+ *   th9x - http://code.google.com/p/th9x 
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "opentx.h"
+
+uint32_t pwroffPressed()
+{
+#if defined(SIMU) || defined(REVA)
+  return false;
+#else
+  return !(PIOC->PIO_PDSR & PIO_PC17);
+#endif
+}
 
 uint32_t pwrCheck()
 {
@@ -32,7 +41,7 @@ uint32_t pwrCheck()
   else
     return e_power_on;
 #elif defined(REVB)
-  if (PIOC->PIO_PDSR & PIO_PC17)
+  if (!pwroffPressed())
     return e_power_on;
   else if (usbPlugged())
     return e_power_usb;
@@ -41,7 +50,7 @@ uint32_t pwrCheck()
   else
     return e_power_off;
 #else
-  if (PIOC->PIO_PDSR & PIO_PC17)
+  if (!pwroffPressed())
     return e_power_on;
   else if (PIOA->PIO_PDSR & PIO_PA8)
     return e_power_trainer;
diff --git a/radio/src/targets/taranis/board_taranis.h b/radio/src/targets/taranis/board_taranis.h
index d9ca59219..92f3bc580 100644
--- a/radio/src/targets/taranis/board_taranis.h
+++ b/radio/src/targets/taranis/board_taranis.h
@@ -286,6 +286,9 @@ void pwrOff(void);
 #if defined(REV9E)
 uint32_t pwrPressed(void);
 uint32_t pwrPressedDuration(void);
+#define pwroffPressed() pwrPressed()
+#else
+uint32_t pwroffPressed(void);
 #endif
 #define UNEXPECTED_SHUTDOWN()   (g_eeGeneral.unexpectedShutdown)
 
diff --git a/radio/src/targets/taranis/pwr_driver.c b/radio/src/targets/taranis/pwr_driver.c
index d76484560..13d8400ee 100644
--- a/radio/src/targets/taranis/pwr_driver.c
+++ b/radio/src/targets/taranis/pwr_driver.c
@@ -2,7 +2,7 @@
  * Copyright (C) OpenTX
  *
  * Based on code named
- *   th9x - http://code.google.com/p/th9x 
+ *   th9x - http://code.google.com/p/th9x
  *   er9x - http://code.google.com/p/er9x
  *   gruvin9x - http://code.google.com/p/gruvin9x
  *
@@ -18,7 +18,7 @@
  * GNU General Public License for more details.
  */
 
-#include "../../pwr.h"
+#include "pwr.h"
 #include "board_taranis.h"
 
 void pwrInit()
@@ -43,12 +43,12 @@ void pwrInit()
   GPIO_InitStructure.GPIO_Pin = INTMODULE_PWR_GPIO_PIN;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
   GPIO_Init(INTMODULE_PWR_GPIO, &GPIO_InitStructure);
-  
+
   GPIO_ResetBits(EXTMODULE_PWR_GPIO, EXTMODULE_PWR_GPIO_PIN);
   GPIO_InitStructure.GPIO_Pin = EXTMODULE_PWR_GPIO_PIN;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
   GPIO_Init(EXTMODULE_PWR_GPIO, &GPIO_InitStructure);
-  
+
   GPIO_InitStructure.GPIO_Pin = TRAINER_GPIO_PIN_DETECT;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
   GPIO_Init(TRAINER_GPIO_DETECT, &GPIO_InitStructure);
@@ -71,7 +71,7 @@ void pwrOff()
   while(1) {
     wdt_reset();
 #if defined(REV9E)
-    // 9E needs watchdog reset because CPU is still running while 
+    // 9E needs watchdog reset because CPU is still running while
     // the power key is held pressed by the user.
     // The power key should be released by now, but we must make sure
     if (!pwrPressed()) {
@@ -87,7 +87,7 @@ void pwrOff()
     }
 #endif
   }
-  //this function must not return!
+  // this function must not return!
 }
 
 #if defined(REV9E)
@@ -95,20 +95,21 @@ uint32_t pwrPressed()
 {
   return GPIO_ReadInputDataBit(PWR_GPIO, PWR_SWITCH_GPIO_PIN) == Bit_RESET;
 }
+#else
+uint32_t pwroffPressed()
+{
+  return GPIO_ReadInputDataBit(PWR_GPIO, PWR_SWITCH_GPIO_PIN) != Bit_RESET;
+}
 #endif
 
 #if !defined(REV9E)
 uint32_t pwrCheck()
 {
-#if defined(SIMU)
-  return e_power_on;
-#else
-  if (GPIO_ReadInputDataBit(PWR_GPIO, PWR_SWITCH_GPIO_PIN) == Bit_RESET)
+  if (!pwroffPressed())
     return e_power_on;
   else if (usbPlugged())
     return e_power_usb;
   else
     return e_power_off;
-#endif
 }
 #endif
diff --git a/radio/src/tasks_arm.cpp b/radio/src/tasks_arm.cpp
index 3e36f72c9..903cd3198 100644
--- a/radio/src/tasks_arm.cpp
+++ b/radio/src/tasks_arm.cpp
@@ -91,6 +91,32 @@ uint16_t stackAvailable()
 }
 #endif
 
+volatile uint16_t timeForcePowerOffPressed = 0;
+
+void resetForcePowerOffRequest()
+{
+  timeForcePowerOffPressed = 0;
+}
+
+bool isForcePowerOffRequested()
+{
+  if (pwroffPressed()) {
+    if (timeForcePowerOffPressed == 0) {
+      timeForcePowerOffPressed = get_tmr10ms();
+    }
+    else {
+      uint16_t delay = (uint16_t)get_tmr10ms() - timeForcePowerOffPressed;
+      if (delay > 1000/*10s*/) {
+        return true;
+      }
+    }
+  }
+  else {
+    resetForcePowerOffRequest();
+  }
+  return false;
+}
+
 uint32_t nextMixerTime[NUM_MODULES];
 
 void mixerTask(void * pdata)
@@ -111,6 +137,10 @@ void mixerTask(void * pdata)
 
     CoTickDelay(1);
 
+    if (isForcePowerOffRequested()) {
+      pwrOff();
+    }
+
     uint32_t now = CoGetOSTime();
     bool run = false;
     if ((now - lastRunTime) > 10) {     // run at least every 20ms
@@ -160,7 +190,7 @@ void mixerTask(void * pdata)
 
 void scheduleNextMixerCalculation(uint8_t module, uint16_t delay)
 {
-  // Schedule next mixer calculation time, 
+  // Schedule next mixer calculation time,
   // for now assume mixer calculation takes 2 ms.
   nextMixerTime[module] = (uint32_t)CoGetOSTime() + (delay)/2 - 1/*2ms*/;
   DEBUG_TIMER_STOP(debugTimerMixerCalcToUsage);
@@ -197,6 +227,8 @@ void menusTask(void * pdata)
       CoTickDelay(MENU_TASK_PERIOD_TICKS - runtime);
     }
 
+    resetForcePowerOffRequest();
+
 #if defined(SIMU)
     if (main_thread_running == 0)
       break;