sharpywesley Posted July 31, 2014 Share Posted July 31, 2014 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. Quote Link to comment Share on other sites More sharing options...
mw86 Posted August 1, 2014 Share Posted August 1, 2014 Hmm i would really try again setting AHCI as it should stay and not keep resetting to Raid. Quote Link to comment Share on other sites More sharing options...
NonXtreme Posted August 2, 2014 Share Posted August 2, 2014 Set/enable UEFI boot instead of Legacy Quote Link to comment Share on other sites More sharing options...
obc993 Posted September 29, 2014 Share Posted September 29, 2014 I once changed the option of achi and, tried to revert the change but no luck i had to format the drive, you could also try with the recovery dvd or with a bootable usb Quote Link to comment Share on other sites More sharing options...
mw86 Posted September 30, 2014 Share Posted September 30, 2014 true depending on the OS installed it needs to be set how it originally was like legacy or UEFI boot or the issue is that Raid/ata/ahci mode... or the boot order on your devices is not all set correct. I would lean toward the UEFI or Legacy bios mode being the issue. Quote Link to comment Share on other sites More sharing options...
H658tu Posted September 30, 2014 Share Posted September 30, 2014 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?As the cmos was replaced the bios reverted to its default settings, so the ahci > raid was to be expected. But it seems any changes in the bios do no stick; try changing the bios' system time and see whether this stays on reboot. If it doesn't, your cmos is still the issueAlso check whether the raid controller is set to "disabled" in the bios, active may be its default setting. 1 Quote Link to comment Share on other sites More sharing options...
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