2. Then, extract the sp49569 (for this HP DV4-1225DX)
把下载下来的exe文件用Winrar解压(得到10多个文件,只需要其中的30FBF55.FD)
3. Format the USB in FAT then copy the 30FBF55.FD file. After that rename it to 30FB.BIN.
把U盘格式化成FAT格式(或者FAT32),然后把30FBF55.FD拷贝到U盘里，再把文件重命名为30FB.BIN
4. Shut the machine down and take disassemble the battery.
将准备要刷BIOS的笔记本关闭并将电池取下
5. Unplug the DC adapter then plug the USB with 30FB.BIN in it.
拔下直流电源插头，然后将装有30FB.BIN文件的U盘插入电脑
6. Hold down “Windows” and “B” buttons.
同时按住 windows图标按键+B键
7. Connect the DC adapter.
双手保持按住按键，然后插上直流电源
8. Boot the computer. When the light flashes, release the “windows” and “b” buttons.
按开机键，直到看到U盘灯闪烁，松开windows图标按键+B键
The steps above will let you to enter the CRM (Crisis Recovery Mode) thus you will hear the beep sounds after the HP Pavilion Dv2, DV4-1225DX BIOS restored. Sooner, you can preview your activity on the thumbdrive during the process.
以上步骤能让你的笔记本进入CRM模式(具体我也不懂)，然后你会听到笔记本发出"B"的一声，就说明正式开始刷BIOS了，稍等，然后你的机子会自动关机。然后你拔下U盘重启，这时，是不是出现熟悉的Windows开机画面了！到此为止搞掂！
