There is a sticker on the underside of the notebook.
Product: Compaq Presario V3700
s/n: 2CE8292GKS
p/n: FF444PA#AKL
V3905TU
Warranty: 1 year
Indeed, if you look in Start >> All Programs >> Accessories >> System Tools >> System Information
it says: Presario V3700 notebook PC
There isn't any driver for Presario V3700 on hp website directly, but there is for V3700 CTO if I remembered correctly. And V3905TU is in V3900 section.
You are right. Most drivers are in Windows Vista including chipset, but this notebook, no matter when, doesn't use Vista. At first bought, it had been downgraded to XP (and I think then, the driver is at least almost complete. -- the shop did everything for me.) Can I use the Vista drivers?
About the chipset driver and VGA.
I got the SMBus from DriverMax and I couldn't tell if it is working correctly or not.
I got the VGA from Intel and it works, but it won't show the volume meter when I used QuickLaunch button for volume adjustment (but it still works). Guess I'll have to download one from hp website.
About the device ID of SMBus, I couldn't tell what it is after I successfully installed the driver. I moved from Unknown Device to somewhere I don't know.
I did search the device ID, but I couldn't remember what I did next. Probably went to Intel website?
Now, there is one more issue (besides the earphone stuff). How do I make battery meter appear on the taskbar? (Show percentage or time remaining) I successfully installed HP battery check and the program works.
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Thanks Allan and Sykes a lot for help. This is the first time I've been in the driver *censored*.