Originally Posted by The Jack of Clubs
if you can do "adb devices" and get a response, then it doesnt sound like you are in fastboot mode. try doing "adb reboot bootloader" and see if your phone goes into fastboot. then in fastboot mode, see if you can see your phone in device manager.
Here are the steps I take (in order that I do them)
Step 1 . adb reboot bootloader <<- This reboots my OPO into Fastboot Mode, an I can actually see in that mode.
Step 2. fastboot oem device-info <<- this hangs forever, or any other fastboot command, the OPO hangs with "<waiting for device>" as if it is no longer attached.
So, yes, I am in fastboot mode, and my OPO actually displays the CM face logo and underneath it says "fastboot mode" on its display.