diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 8fca720..c7781cb 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -470,6 +470,8 @@ int hg_scanner::set_server_blacklist_lock()
 
 	string sn = get_serial_num();
 	string fv = get_firmware_version();
+	if (fv.empty())
+		return -1;
 	strcpy(snbuffer, sn.c_str());
 	strcpy(fvbuffer, fv.c_str());
 	sprintf(pidbuffer, "%0x", pid_);
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 5e763a7..4aa9bcc 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -396,6 +396,9 @@ void hg_scanner_239::init_version(void)
 {
 	std::string fv(get_firmware_version()),
 				sn(get_serial_num());
+	if (fv.empty())
+		return;
+
 	string dev = fv.substr(0, 2);
 	string ver = fv.substr(2, 3);
 	string date = fv.substr(5, 5);
diff --git a/hgdriver/hgdev/hg_scanner_302.cpp b/hgdriver/hgdev/hg_scanner_302.cpp
index f85bab8..ab0258e 100644
--- a/hgdriver/hgdev/hg_scanner_302.cpp
+++ b/hgdriver/hgdev/hg_scanner_302.cpp
@@ -411,7 +411,8 @@ void hg_scanner_302::init_version(void)
 {
 	std::string fv(get_firmware_version()),
 				sn(get_serial_num());
-
+	if (fv.empty())
+		return;
 	VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Firmware version: %s\n", fv.c_str());
 	VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Serial number: %s\n", sn.c_str());
 	//VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "  HG3399 IP: %s\n", get_ip().c_str());
diff --git a/hgdriver/hgdev/hg_scanner_402.cpp b/hgdriver/hgdev/hg_scanner_402.cpp
index d59a81a..0e66f31 100644
--- a/hgdriver/hgdev/hg_scanner_402.cpp
+++ b/hgdriver/hgdev/hg_scanner_402.cpp
@@ -379,7 +379,8 @@ void hg_scanner_402::init_version(void)
 {
 	std::string fv(get_firmware_version()),
 				sn(get_serial_num());
-
+	if (fv.empty())
+		return;
 	VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Firmware version: %s\n", fv.c_str());
 	VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Serial number: %s\n", sn.c_str());
 	//VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "  HG3399 IP: %s\n", get_ip().c_str());
diff --git a/hgdriver/hgdev/scanner_manager.cpp b/hgdriver/hgdev/scanner_manager.cpp
index f789f26..ebb871c 100644
--- a/hgdriver/hgdev/scanner_manager.cpp
+++ b/hgdriver/hgdev/scanner_manager.cpp
@@ -63,7 +63,7 @@ g_supporting_devices[] = {
 #else
                            {0x3072, PID_AND_NAME(100, SCANNER_NAME_HG_G100), "G100", "", &hg_scanner_mgr::create_scanner_g100}
                          , {0x3072, PID_AND_NAME(139, SCANNER_NAME_HG_G100), "G100", "", &hg_scanner_mgr::create_scanner_g239}
-                         , {0x3072, PID_AND_NAME(200, SCANNER_NAME_HG_G200), "G200", "", &hg_scanner_mgr::create_scanner_g239}
+                         , {0x3072, PID_AND_NAME(200, SCANNER_NAME_HG_G200), "G200", "", &hg_scanner_mgr::create_scanner_g100}
                          , {0x3072, PID_AND_NAME(239, SCANNER_NAME_HG_G200), "G200", "", &hg_scanner_mgr::create_scanner_g239}
                          , {0x3072, PID_AND_NAME(300, SCANNER_NAME_HG_G300), "G300", "", &hg_scanner_mgr::create_scanner_g300}
                          , {0x3072, PID_AND_NAME(302, SCANNER_NAME_HG_G300), "G300", "", &hg_scanner_mgr::create_scanner_g302}