diff --git a/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py b/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py
index 94493b9..767c47c 100644
--- a/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py
+++ b/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py
@@ -314,11 +314,10 @@ class EPD:
         
         self.send_command(0x01) # POWER_SETTING
         self.send_data(0x03) # VDS_EN, VDG_EN
-        self.send_data(0x00) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
-        # self.send_data(0x2b) # VDH
-        # self.send_data(0x2b) # VDL
-        self.send_data(0x00)
-        self.send_data(0x00)
+        # self.send_data(0x00) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
+        self.send_data(0x07) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
+        self.send_data(0x2b) # VDH
+        self.send_data(0x2b) # VDL
         self.send_data(0x09) # VDHR
         
         self.send_command(0x06) # BOOSTER_SOFT_START