diff --git a/app/scanner2/mainwindow.cpp b/app/scanner2/mainwindow.cpp
index 5793dae8..c5132fae 100644
--- a/app/scanner2/mainwindow.cpp
+++ b/app/scanner2/mainwindow.cpp
@@ -782,6 +782,7 @@ void MainWindow::on_AcquireInto2()
         if (HGSANE_ERR_DEVICEOFFLINE == ret)
         {
             deviceIsOnline = false;
+            QMessageBox::information(this, tr("Prompt"), tr("Device is offline"));
         }
 #endif
 
@@ -1536,6 +1537,7 @@ void MainWindow::on_scanFinishEvent()
             if (HGSANE_ERR_DEVICEOFFLINE == ret)
             {
                 deviceIsOnline = false;
+                QMessageBox::information(this, tr("Prompt"), tr("Device is offline"));
             }
 #endif
 
@@ -3740,6 +3742,7 @@ void MainWindow::on_act_acquire_triggered()
         if (HGSANE_ERR_DEVICEOFFLINE == ret)
         {
             deviceIsOnline = false;
+            QMessageBox::information(this, tr("Prompt"), tr("Device is offline"));
         }
 #endif
 
@@ -3872,6 +3875,7 @@ void MainWindow::on_act_acquireInto_triggered()
             if (HGSANE_ERR_DEVICEOFFLINE == ret)
             {
                 deviceIsOnline = false;
+                QMessageBox::information(this, tr("Prompt"), tr("Device is offline"));
             }
 #endif
 
@@ -3960,6 +3964,7 @@ void MainWindow::on_act_insertFromScanner_triggered()
             if (HGSANE_ERR_DEVICEOFFLINE == ret)
             {
                 deviceIsOnline = false;
+                QMessageBox::information(this, tr("Prompt"), tr("Device is offline"));
             }
 #endif
 
diff --git a/app/scantool/mainwindow.cpp b/app/scantool/mainwindow.cpp
index b0384ea3..cebbc133 100644
--- a/app/scantool/mainwindow.cpp
+++ b/app/scantool/mainwindow.cpp
@@ -25,7 +25,7 @@ MainWindow::MainWindow(QWidget *parent)
     , m_dlgScanInfo(nullptr)
     , m_devHandle(nullptr)
     , m_scanning(false)
-    , m_isFirstConnectServer(false)
+    , m_isFirstConnectServer(true)
     , m_dpi(200)
     , m_scanFileName("")
     , m_scanImgFmtWriter(nullptr)
@@ -1263,10 +1263,6 @@ void MainWindow::timerEvent(QTimerEvent *e)
             this->killTimer(m_timerId);
             m_timerId = -1;
         }
-        else
-        {
-            m_timerId = this->startTimer(5000);
-        }
     }
 }