diff --git a/server/src/main/java/com/genymobile/scrcpy/Device.java b/server/src/main/java/com/genymobile/scrcpy/Device.java
index 538135d4..0246b216 100644
--- a/server/src/main/java/com/genymobile/scrcpy/Device.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Device.java
@@ -162,6 +162,10 @@ public final class Device {
      */
     public void setScreenPowerMode(int mode) {
         IBinder d = SurfaceControl.getBuiltInDisplay(0);
+        if (d == null) {
+            Ln.e("Could not get built-in display");
+            return;
+        }
         SurfaceControl.setDisplayPowerMode(d, mode);
         Ln.i("Device screen turned " + (mode == Device.POWER_MODE_OFF ? "off" : "on"));
     }
diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/ClipboardManager.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/ClipboardManager.java
index a058a8bb..7dc2e75e 100644
--- a/server/src/main/java/com/genymobile/scrcpy/wrappers/ClipboardManager.java
+++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/ClipboardManager.java
@@ -1,5 +1,7 @@
 package com.genymobile.scrcpy.wrappers;
 
+import com.genymobile.scrcpy.Ln;
+
 import android.content.ClipData;
 import android.os.IInterface;
 
@@ -8,37 +10,62 @@ import java.lang.reflect.Method;
 
 public class ClipboardManager {
     private final IInterface manager;
-    private final Method getPrimaryClipMethod;
-    private final Method setPrimaryClipMethod;
+    private Method getPrimaryClipMethod;
+    private Method setPrimaryClipMethod;
 
     public ClipboardManager(IInterface manager) {
         this.manager = manager;
-        try {
-            getPrimaryClipMethod = manager.getClass().getMethod("getPrimaryClip", String.class);
-            setPrimaryClipMethod = manager.getClass().getMethod("setPrimaryClip", ClipData.class, String.class);
-        } catch (NoSuchMethodException e) {
-            throw new AssertionError(e);
+    }
+
+    private Method getGetPrimaryClipMethod() {
+        if (getPrimaryClipMethod == null) {
+            try {
+                getPrimaryClipMethod = manager.getClass().getMethod("getPrimaryClip", String.class);
+            } catch (NoSuchMethodException e) {
+                Ln.e("Could not find method", e);
+            }
         }
+        return getPrimaryClipMethod;
+    }
+
+    private Method getSetPrimaryClipMethod() {
+        if (setPrimaryClipMethod == null) {
+            try {
+                setPrimaryClipMethod = manager.getClass().getMethod("setPrimaryClip", ClipData.class, String.class);
+            } catch (NoSuchMethodException e) {
+                Ln.e("Could not find method", e);
+            }
+        }
+        return setPrimaryClipMethod;
     }
 
     public CharSequence getText() {
+        Method method = getGetPrimaryClipMethod();
+        if (method == null) {
+            return null;
+        }
         try {
-            ClipData clipData = (ClipData) getPrimaryClipMethod.invoke(manager, "com.android.shell");
+            ClipData clipData = (ClipData) method.invoke(manager, "com.android.shell");
             if (clipData == null || clipData.getItemCount() == 0) {
                 return null;
             }
             return clipData.getItemAt(0).getText();
         } catch (InvocationTargetException | IllegalAccessException e) {
-            throw new AssertionError(e);
+            Ln.e("Could not invoke " + method.getName(), e);
+            return null;
         }
     }
 
     public void setText(CharSequence text) {
+        Method method = getSetPrimaryClipMethod();
+        if (method == null) {
+            return;
+        }
         ClipData clipData = ClipData.newPlainText(null, text);
         try {
-            setPrimaryClipMethod.invoke(manager, clipData, "com.android.shell");
+            method.invoke(manager, clipData, "com.android.shell");
         } catch (InvocationTargetException | IllegalAccessException e) {
-            throw new AssertionError(e);
+            Ln.e("Could not invoke " + method.getName(), e);
         }
     }
 }
diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java
index 1fc78c27..788a04c7 100644
--- a/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java
+++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java
@@ -1,5 +1,7 @@
 package com.genymobile.scrcpy.wrappers;
 
+import com.genymobile.scrcpy.Ln;
+
 import android.os.IInterface;
 import android.view.InputEvent;
 
@@ -13,22 +15,33 @@ public final class InputManager {
     public static final int INJECT_INPUT_EVENT_MODE_WAIT_FOR_FINISH = 2;
 
     private final IInterface manager;
-    private final Method injectInputEventMethod;
+    private Method injectInputEventMethod;
 
     public InputManager(IInterface manager) {
         this.manager = manager;
-        try {
-            injectInputEventMethod = manager.getClass().getMethod("injectInputEvent", InputEvent.class, int.class);
-        } catch (NoSuchMethodException e) {
-            throw new AssertionError(e);
+    }
+
+    private Method getInjectInputEventMethod() {
+        if (injectInputEventMethod == null) {
+            try {
+                injectInputEventMethod = manager.getClass().getMethod("injectInputEvent", InputEvent.class, int.class);
+            } catch (NoSuchMethodException e) {
+                Ln.e("Could not find method", e);
+            }
         }
+        return injectInputEventMethod;
     }
 
     public boolean injectInputEvent(InputEvent inputEvent, int mode) {
+        Method method = getInjectInputEventMethod();
+        if (method == null) {
+            return false;
+        }
         try {
-            return (Boolean) injectInputEventMethod.invoke(manager, inputEvent, mode);
+            return (Boolean) method.invoke(manager, inputEvent, mode);
         } catch (InvocationTargetException | IllegalAccessException e) {
-            throw new AssertionError(e);
+            Ln.e("Could not invoke " + method.getName(), e);
+            return false;
         }
     }
 }
diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/PowerManager.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/PowerManager.java
index a730d1b1..66acdba8 100644
--- a/server/src/main/java/com/genymobile/scrcpy/wrappers/PowerManager.java
+++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/PowerManager.java
@@ -1,5 +1,7 @@
 package com.genymobile.scrcpy.wrappers;
 
+import com.genymobile.scrcpy.Ln;
+
 import android.annotation.SuppressLint;
 import android.os.Build;
 import android.os.IInterface;
@@ -9,24 +11,35 @@ import java.lang.reflect.Method;
 
 public final class PowerManager {
     private final IInterface manager;
-    private final Method isScreenOnMethod;
+    private Method isScreenOnMethod;
 
     public PowerManager(IInterface manager) {
         this.manager = manager;
-        try {
-            @SuppressLint("ObsoleteSdkInt") // we may lower minSdkVersion in the future
-            String methodName = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH ? "isInteractive" : "isScreenOn";
-            isScreenOnMethod = manager.getClass().getMethod(methodName);
-        } catch (NoSuchMethodException e) {
-            throw new AssertionError(e);
+    }
+
+    private Method getIsScreenOnMethod() {
+        if (isScreenOnMethod == null) {
+            try {
+                @SuppressLint("ObsoleteSdkInt") // we may lower minSdkVersion in the future
+                        String methodName = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH ? "isInteractive" : "isScreenOn";
+                isScreenOnMethod = manager.getClass().getMethod(methodName);
+            } catch (NoSuchMethodException e) {
+                Ln.e("Could not find method", e);
+            }
         }
+        return isScreenOnMethod;
     }
 
     public boolean isScreenOn() {
+        Method method = getIsScreenOnMethod();
+        if (method == null) {
+            return false;
+        }
         try {
-            return (Boolean) isScreenOnMethod.invoke(manager);
+            return (Boolean) method.invoke(manager);
         } catch (InvocationTargetException | IllegalAccessException e) {
-            throw new AssertionError(e);
+            Ln.e("Could not invoke " + method.getName(), e);
+            return false;
         }
     }
 }
diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/StatusBarManager.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/StatusBarManager.java
index 7cd28da6..670de952 100644
--- a/server/src/main/java/com/genymobile/scrcpy/wrappers/StatusBarManager.java
+++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/StatusBarManager.java
@@ -17,35 +17,49 @@ public class StatusBarManager {
         this.manager = manager;
     }
 
-    public void expandNotificationsPanel() {
+    private Method getExpandNotificationsPanelMethod() {
         if (expandNotificationsPanelMethod == null) {
             try {
                 expandNotificationsPanelMethod = manager.getClass().getMethod("expandNotificationsPanel");
             } catch (NoSuchMethodException e) {
-                Ln.e("ServiceBarManager.expandNotificationsPanel() is not available on this device");
-                return;
+                Ln.e("Could not find method", e);
             }
         }
-        try {
-            expandNotificationsPanelMethod.invoke(manager);
-        } catch (InvocationTargetException | IllegalAccessException e) {
-            Ln.e("Could not invoke ServiceBarManager.expandNotificationsPanel()", e);
-        }
+        return expandNotificationsPanelMethod;
     }
 
-    public void collapsePanels() {
+    private Method getCollapsePanelsMethod() {
         if (collapsePanelsMethod == null) {
             try {
                 collapsePanelsMethod = manager.getClass().getMethod("collapsePanels");
             } catch (NoSuchMethodException e) {
-                Ln.e("ServiceBarManager.collapsePanels() is not available on this device");
-                return;
+                Ln.e("Could not find method", e);
             }
         }
+        return collapsePanelsMethod;
+    }
+
+    public void expandNotificationsPanel() {
+        Method method = getExpandNotificationsPanelMethod();
+        if (method == null) {
+            return;
+        }
         try {
-            collapsePanelsMethod.invoke(manager);
+            method.invoke(manager);
         } catch (InvocationTargetException | IllegalAccessException e) {
-            Ln.e("Could not invoke ServiceBarManager.collapsePanels()", e);
+            Ln.e("Could not invoke " + method.getName(), e);
+        }
+    }
+
+    public void collapsePanels() {
+        Method method = getCollapsePanelsMethod();
+        if (method == null) {
+            return;
+        }
+        try {
+            method.invoke(manager);
+        } catch (InvocationTargetException | IllegalAccessException e) {
+            Ln.e("Could not invoke " + method.getName(), e);
         }
     }
 }
diff --git a/server/src/main/java/com/genymobile/scrcpy/wrappers/SurfaceControl.java b/server/src/main/java/com/genymobile/scrcpy/wrappers/SurfaceControl.java
index 5b5586ff..ba37da0d 100644
--- a/server/src/main/java/com/genymobile/scrcpy/wrappers/SurfaceControl.java
+++ b/server/src/main/java/com/genymobile/scrcpy/wrappers/SurfaceControl.java
@@ -1,11 +1,16 @@
 package com.genymobile.scrcpy.wrappers;
 
+import com.genymobile.scrcpy.Ln;
+
 import android.annotation.SuppressLint;
 import android.graphics.Rect;
 import android.os.Build;
 import android.os.IBinder;
 import android.view.Surface;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
 @SuppressLint("PrivateApi")
 public final class SurfaceControl {
 
@@ -23,6 +28,9 @@ public final class SurfaceControl {
         }
     }
 
+    private static Method getBuiltInDisplayMethod;
+    private static Method setDisplayPowerModeMethod;
+
     private SurfaceControl() {
         // only static methods
     }
@@ -76,24 +84,56 @@ public final class SurfaceControl {
         }
     }
 
-    public static IBinder getBuiltInDisplay(int builtInDisplayId) {
-        try {
-            // the method signature has changed in Android Q
-            // <https://github.com/Genymobile/scrcpy/issues/586>
-            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
-                return (IBinder) CLASS.getMethod("getBuiltInDisplay", int.class).invoke(null, builtInDisplayId);
+    private static Method getGetBuiltInDisplayMethod() {
+        if (getBuiltInDisplayMethod == null) {
+            try {
+                // the method signature has changed in Android Q
+                // <https://github.com/Genymobile/scrcpy/issues/586>
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+                    getBuiltInDisplayMethod = CLASS.getMethod("getBuiltInDisplay", int.class);
+                } else {
+                    getBuiltInDisplayMethod = CLASS.getMethod("getPhysicalDisplayToken", long.class);
+                }
+            } catch (NoSuchMethodException e) {
+                Ln.e("Could not find method", e);
             }
-            return (IBinder) CLASS.getMethod("getPhysicalDisplayToken", long.class).invoke(null, builtInDisplayId);
-        } catch (Exception e) {
-            throw new AssertionError(e);
+        }
+        return getBuiltInDisplayMethod;
+    }
+
+    public static IBinder getBuiltInDisplay(int builtInDisplayId) {
+        Method method = getGetBuiltInDisplayMethod();
+        if (method == null) {
+            return null;
+        }
+        try {
+            return (IBinder) method.invoke(null, builtInDisplayId);
+        } catch (InvocationTargetException | IllegalAccessException e) {
+            Ln.e("Could not invoke " + method.getName(), e);
+            return null;
         }
     }
 
+    private static Method getSetDisplayPowerModeMethod() {
+        if (setDisplayPowerModeMethod == null) {
+            try {
+                setDisplayPowerModeMethod = CLASS.getMethod("setDisplayPowerMode", IBinder.class, int.class);
+            } catch (NoSuchMethodException e) {
+                Ln.e("Could not find method", e);
+            }
+        }
+        return setDisplayPowerModeMethod;
+    }
+
     public static void setDisplayPowerMode(IBinder displayToken, int mode) {
+        Method method = getSetDisplayPowerModeMethod();
+        if (method == null) {
+            return;
+        }
         try {
-            CLASS.getMethod("setDisplayPowerMode", IBinder.class, int.class).invoke(null, displayToken, mode);
-        } catch (Exception e) {
-            throw new AssertionError(e);
+            method.invoke(null, displayToken, mode);
+        } catch (InvocationTargetException | IllegalAccessException e) {
+            Ln.e("Could not invoke " + method.getName(), e);
         }
     }