diff --git a/Hardware/LPC/F718XX.cs b/Hardware/LPC/F718XX.cs
index 7d95d44..b8c580a 100644
--- a/Hardware/LPC/F718XX.cs
+++ b/Hardware/LPC/F718XX.cs
@@ -130,8 +130,6 @@ namespace OpenHardwareMonitor.Hardware.LPC {
         sensor.Value = voltageGains[sensor.Index] * 0.001f * (value << 4);
         if (sensor.Value > 0)
           ActivateSensor(sensor);
-        else
-          DeactivateSensor(sensor);
       }
      
       foreach (Sensor sensor in temperatures) {
@@ -156,7 +154,7 @@ namespace OpenHardwareMonitor.Hardware.LPC {
                 sensor.Value = value / 128.0f;
                 ActivateSensor(sensor);
               } else {
-                DeactivateSensor(sensor);
+                sensor.Value = null;
               }
           } break;
           default: {
@@ -165,8 +163,6 @@ namespace OpenHardwareMonitor.Hardware.LPC {
             sensor.Value = value + sensor.Parameters[0].Value;
             if (value < sbyte.MaxValue && value > 0)
               ActivateSensor(sensor);
-            else
-              DeactivateSensor(sensor);
           } break;
         }
       }
@@ -180,7 +176,7 @@ namespace OpenHardwareMonitor.Hardware.LPC {
           if (sensor.Value > 0)
             ActivateSensor(sensor);
         } else {
-          DeactivateSensor(sensor);
+          sensor.Value = null;
         }
       }      
     }
diff --git a/Hardware/LPC/IT87XX.cs b/Hardware/LPC/IT87XX.cs
index 5b9c6a2..a914d3b 100644
--- a/Hardware/LPC/IT87XX.cs
+++ b/Hardware/LPC/IT87XX.cs
@@ -165,9 +165,7 @@ namespace OpenHardwareMonitor.Hardware.LPC {
 
         sensor.Value = voltageGains[sensor.Index] * 0.001f * (value << 4);
         if (sensor.Value > 0)
-          ActivateSensor(sensor);
-        else
-          DeactivateSensor(sensor);
+          ActivateSensor(sensor);        
       }
 
       foreach (Sensor sensor in temperatures) {
@@ -179,9 +177,7 @@ namespace OpenHardwareMonitor.Hardware.LPC {
 
         sensor.Value = value + sensor.Parameters[0].Value;
         if (value < sbyte.MaxValue && value > 0)
-          ActivateSensor(sensor);
-        else
-          DeactivateSensor(sensor);
+          ActivateSensor(sensor);        
       }
 
       foreach (Sensor sensor in fans) {
@@ -198,7 +194,7 @@ namespace OpenHardwareMonitor.Hardware.LPC {
           if (sensor.Value > 0)
             ActivateSensor(sensor);
         } else {
-          DeactivateSensor(sensor);
+          sensor.Value = null;
         }
       }      
     }   
diff --git a/Hardware/LPC/W836XX.cs b/Hardware/LPC/W836XX.cs
index 649d004..1bf5b61 100644
--- a/Hardware/LPC/W836XX.cs
+++ b/Hardware/LPC/W836XX.cs
@@ -215,8 +215,6 @@ namespace OpenHardwareMonitor.Hardware.LPC {
           }
           if (sensor.Value > 0)
             ActivateSensor(sensor);
-          else
-            DeactivateSensor(sensor);
         } else {
           // Battery voltage
           bool valid = (ReadByte(0, 0x5D) & 0x01) > 0;
@@ -224,8 +222,9 @@ namespace OpenHardwareMonitor.Hardware.LPC {
             sensor.Value =
               0.008f * voltageGains[sensor.Index] * ReadByte(5, 0x51);
             ActivateSensor(sensor);
-          } else
-            DeactivateSensor(sensor);
+          } else {
+            sensor.Value = null;
+          }
         }
       }
 
@@ -241,7 +240,7 @@ namespace OpenHardwareMonitor.Hardware.LPC {
           sensor.Value = temperature + sensor.Parameters[0].Value;
           ActivateSensor(sensor);
         } else {
-          DeactivateSensor(sensor);
+          sensor.Value = null;
         }
       }