diff --git a/ohmpi/hardware_components/abstract_hardware_components.py b/ohmpi/hardware_components/abstract_hardware_components.py
index eb85474879fba43d494766596a223390f725352f..54c56fb466a19742185f600cff3ace373f3c48e7 100644
--- a/ohmpi/hardware_components/abstract_hardware_components.py
+++ b/ohmpi/hardware_components/abstract_hardware_components.py
@@ -396,7 +396,6 @@ class TxAbstract(ABC):
 
     @pwr_state.setter
     def pwr_state(self, state):
-
         if state == 'on':
             self._pwr_state = 'on'
             self.exec_logger.debug(f'{self.model} cannot switch on power source')
diff --git a/ohmpi/hardware_components/mb_2024_0_2.py b/ohmpi/hardware_components/mb_2024_0_2.py
index b82545da18831c317eebe427710f78f1e65f1b7d..5f8f4fb115547d86a752cd7aa1e9986632f81c6d 100644
--- a/ohmpi/hardware_components/mb_2024_0_2.py
+++ b/ohmpi/hardware_components/mb_2024_0_2.py
@@ -93,10 +93,10 @@ class Tx(Tx_mb_2023):
         if not subclass_init:
             self.exec_logger.event(f'{self.model}\ttx_init\tend\t{datetime.datetime.utcnow()}')
 
-    def inject(self, polarity=1, injection_duration=None,switch_pwr=True):
+    def inject(self, polarity=1, injection_duration=None):
         # add leds?
-        self.pin6.value=True
-        Tx_mb_2023.inject(self, polarity=polarity, injection_duration=injection_duration,switch_pwr=switch_pwr)
+        self.pin6.value = True
+        Tx_mb_2023.inject(self, polarity=polarity, injection_duration=injection_duration)
         self.pin6.value = False
 
     @property
diff --git a/ohmpi/hardware_components/pwr_dps5005.py b/ohmpi/hardware_components/pwr_dps5005.py
index c6e3a600da6f6d78170158850357a361c723d86e..691fc39668931c5d691ca3ea1eee1b744ff4ab35 100644
--- a/ohmpi/hardware_components/pwr_dps5005.py
+++ b/ohmpi/hardware_components/pwr_dps5005.py
@@ -78,7 +78,7 @@ class Pwr(PwrAbstract):
     def current_max(self, value):
         self.connection.write_register(0x0001, value * 10, 0)
 
-   def pwr_state(self):
+    def pwr_state(self):
         return self._pwr_state
 
     @pwr_state.setter