Oh! I am sorry for you... I can't help you more, I am sorry
I downloaded from Baidu China an app witch name is
http://www.dafanshu.com/ It seems to be usefull to flash the Jumper.
here original an d english tranlated "how to":
可以选择大番薯u盘启动制作工具来进行系统重装。安装步骤如下：
1、首先将u盘制作大番薯u盘启动盘（从附件中下载安装就ok了），重启电脑等待出现开机画面按下启动快捷键，选择u盘启动进入到大番薯主菜单，选取“【02】运行大番薯Win8PE装机维护版（新机器）”选项，按下回车键确认
2、进入win8PE系统，将会自行弹出安装工具，点击“浏览”进行选择存到u盘中win系统镜像文件。
3、等待大番薯pe装机工具自动加载win系统镜像包安装文件，只需选择安装磁盘位置，然后点击“确定”按钮即可。
4、此时在弹出的提示窗口直接点击“确定”按钮。
5、随后安装工具开始工作，请耐心等待几分钟。
6、完成后会弹出重启电脑提示，点击“是（Y）”按钮即可。
7 、此时就可以拔除u盘了，重启系统开始进行安装，我们无需进行操作，等待安装完成即可，最终进入系统桌面前还会重启一次
You can choose a large sweet potato u disk to start the production tool to reload the system. Installation steps are as follows:
1, the first u disk production big sweet potato u disk boot disk (from the attachment to download and install ok), restart the computer wait for the boot screen press the start shortcut key, select the u disk boot into the big sweet potato main menu, select " 02】 operation of large sweet potato Win8PE installed maintenance version (new machine) "option, press the Enter key to confirm
2, enter the win8PE system, will automatically pop up the installation tool, click on the "Browse" to select the save to u disk win system image file.
3, waiting for large potatoes pe machine tools automatically loaded win system image package installation files, simply select the installation disk location, and then click "OK" button.
4, at this time in the pop-up prompt window, click "OK" button.
5, then install the tool to start work, please be patient for a few minutes.
6, will pop up restart the computer prompts, click "Yes (Y)" button.
7, at this time you can remove the u disk, restart the system to start the installation, we do not need to operate, wait for the installation can be completed, and finally enter the system before the desktop will restart
I didn't found firmwre yet...
Let me know if you find it!
