Hi, I have an Acer Aspire One Netbook model AO-756, I believe it is. It does not boot and gives me error: No bootable devices, please restart system. I have changed hard-drives with working ones. I have also tried bootable usb drives but it will not pick up on any hardware. What else could I do to troubleshoot. I am hoping the motherboard did not go bad. Thanks for any help, or suggestions.