Source: tnkgrl.wordpress.com

After spending several evenings exploring the motherboard of my Asus 701 (Eee) for USB signals and 5V (off in standby) here’s what I’ve discovered.
There’s a 5V trace (off in standby) that’s available without draining current from the existing USB connectors - take a look at the picture above, snapped with my Sony Ericsson K850i (then scaled to 640×480 and annotated).

There are 8 USB ports provided by the Intel chipset:
- 3 are the existing USB connectors
- 1 is used by the SDHC/MMC card reader
- 1 is used by the webcam
- 2 are used by the mini PCIe card slots (1 for each)
- 1 is still unknown (debug connector, perhaps?)

I damaged a USB Bluetooth module while looking for USB signals on the debug connector - doh! Consider this a warning :)

The MDC card slot does not have USB signals available, but both mini PCIe card slots do…

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