I have a older Dell Latitude C400 which has been working fine, but I went to use it last week and got the "no bootable devices" message at startup. I have limited computer knowledge (and even more limited funds for a tech), so any help would be appreciated. This laptop has no cd drive, as I have seen the suggestons on other posts. Also, I have tried removing the battery as suggested in another post but still get the same error message.