Geeetech

My prusa I3 Pro W can't update firm ware. As shown 1-4 pictures. I started with a complete connection (show in figure 1) . After that, I updated the firmware (show figure 2) . Display the confirmation window "Press OK" (Figure 3). Finally, the connection was lost (figure 4).
1. [url=https://uppicimg.com/v/oFiJT6tW][img]https://uppicimg.com/s/oFiJT6tW[/img][/url]
2. [url=https://uppicimg.com/v/sCLVHBeX][img]https://uppicimg.com/s/sCLVHBeX[/img][/url]
3. [url=https://uppicimg.com/v/BY1gk29r][img]https://uppicimg.com/s/BY1gk29r[/img][/url]
4. [url=https://uppicimg.com/v/VqkcfiK9][img]https://uppicimg.com/s/VqkcfiK9[/img][/url]

Have you tried to set baud rate as 256000?
When updating firmware use 256000,
printing use 250000.

250000

use 250000.

Now it's okay.
After upload firmware by arduino "firmware No.13".
After that, update again through the program "EasyPrint3D".

Now it's okay.
After upload firmware by arduino "firmware No.13".
After that, update again through the program "EasyPrint3D".