I have a Blackberry Curve 8520 connected to my computer (using an Asus M3A32-MVP Deluxe with BIOS 2104), and whenever it's connected my motherboard hangs on the POST screen (when it checks for USB devices). I have the Curve, a USB external hard drive and a USB card reader connected to the PC, and only if the Curve is in does it hang. If it's disconnected, boot proceeds normally. I removed "Removable Dev." from the boot order list but it still doesn't work. How do I fix this?
Go into your BIOS and enable all options for your USB settings. You can also try moving one of your devices to a front panel connection to see if that helps. I suspect you have a power issue with your devices pulling too much voltage for the ports. Just a guess at this point.