sharpywesley

Hi just wondering if anyone can help me - I have an Alienware mx14 r2. This morning it started beeping 5 times at me when I turned it on which according to Dell is a cmos batter failure. No problem I thought I can do that - so I got a new battery, replaced the old one and away I went. What happens now is that when I boot I just get a message saying - "no bootable devices - please restart". I go into the bios and all my drives are listed on the main page but there is nothing under bootable devices. Also the sata mode is set to RAID where before it was ACHI. If i change this the same thing happens and it goes back to RAID again? Is there anyway I can update the BIOS or anything else I can do? Any help would be great.