Well, plain and simple: They don't work. All of them.
I am using a WinXP SP3, Home edition. I've already installed NSS (Notebook System Software) to Rev30. I've tried 2 different flash drives with LED indicators (to see if they are functioning), and a USB Mouse. The flash drives flicker real quick when plugged in then go dim.
Yes, they did.
My system corrupted so i reinstalled windows. that's when i had the problem. i even used the disk that came with the laptop, both the windows one and the drivers one.
Test the hardware. Plug in a USB keyboard and boot up the computer. Try and enter BIOS setup with the USB keyboard.
My Insprion 1150's USB ports are fried beyond repair. I took the laptop apart to find the southbridge chip with a burn spot on it. Surprised the rest of the chip works including it's AC97 audio, where the USB portion fried.