HP DV4-12xx 故障自救DIY (JBL20)

硬體發生故障時Caps Lock/Num Lock會一閃一閃的,請參閱此網頁的說明
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01732674&tmp_task=solveCategory&lc=en&dlc=en&cc=us&tool=&query=CQ40-107AU&product=3786474#N215

Number of Blinks (Caps Lock/Num Lock)or Beeps
1 : CPU not functional >>> 換CPU.
2 : BIOS corruption failure
3 : Module error not functional >>> 換RAM. DDR2
4 : Graphics controller not functional >>> 北橋掛點了.無解,報廢
5 : General system board failure >>> EC/南橋掛點了.無解,報廢
6 : BIOS authentication failure
Continuous blink AC power adapter LED Power adapter Insufficient power

如果運氣好是閃2下或是閃6下,更新BIOS應該就可以救回來,以下是BIOS update的方法
http://www.laptops-drivers.com/hp-laptop/how-to-recover-bios-into-hp-pavilion-dv4-cq40-and-c700.html
(HP dv4-1225dx AMD的Driver /BIOS 下載網頁：[http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=4063&lc=en&cc=us&dlc=en&sw_lang=&product=3860437)

如何在不開機的情況之下刷BISO，方法如下：
How to flash the BIOS without any operating system? Here are the steps:
1. Get the BIOS by downloading from HP support and drivers on its website.
2. Then, extract the sp49569 (for this HP DV4-1225DX)
3. Format the USB in FAT then copy the 30FBF55.FD file. After that rename it to 30FB.BIN.
4. Shut the machine down and take disassemble the battery.
5. Unplug the DC adapter then plug the USB with 30FB.BIN in it.
6. Hold down “Windows” and “B” buttons.
7. Connect the DC adapter.
8. Boot the computer. When the light flashes, release the “windows” and “b” buttons.
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.