I installed Lubuntu 12.04 via USB-stick on my EEE PC 1005HA. It booted fine from the hdd with the USB plugged in. If I remove the USB it won't boot from the hdd. When I plug the USB back in, it boots from the hdd just fine but it won't let me boot from the stick even when I select it in the BIOS. I've never experienced something like this. Without the USB plugged in, I just get a blinking underscore and that's it.