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Hi Everyone !!
This is my very 1st post in the forum so please pardon my ignorance. 
Screen flashes 3 times, turns on and off before it begins to boot when UEFI fast boot is enabled.This has been driving me crazy,when I boot only from msata, boot time is around 10 seconds or when I connect only 1 hd in caddy and 1 in normal bay, laptop boots fine but when all three connected, ssd, msata, 2 hd 7200rpm, the screen keeps on flashing several times before it boots relatively slow. I think it starts going nuts when I connect samsung ssd combined with normal hd. I ran Microsoft assessment and got few error about BIOS initialization 
I would appreciate any kind of input .... cheers 
 
My  setup.
Aleinware 18 
i7 4900mq
Nvidia 780m SLI 
Windows 10
256gb msata ssd (boot drive) 
256gb samsung evo 840(hd 1)
1tb 7200rpm hard drive (hd 2)
750gb wd black 7200rpm (hd 3 in Blu-ray slot) 
Fast boot enabled, uefi enabled 
Bios(latest) Ahci 
 
Things i have done 
Removed/updated free fall sensor 
Uninstalled intel RST
Updated bios 
Updated ssd firmware 
Swap hd bays 
turned off fast boot in windows
Fresh OS installed 
Driver updates
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Just to make sure, have you tried to remove the small bios battery?

 

Steps you can try.

Remove any power source from the computer, also the battery.

 

Remove the bios battery.

 

Hold the powerbutton for 30 sec to drain remaining power from the system.

 

Put the bios battery back.

 

Plug you power cable into the computer.

 

Do not insert normal battery yet.

 

Try boot the laptop.

 

 

It should give a 5 beeps beepcode.

 

Turn off the computer again by holding the power button. 

 

Now hold the "FN" key on the keyboard down and turn on the computer.

 

It should turn on for 5 seconds and restart. Keep holding the "FN" key, can't remember when to let go.

 

Now it should boot normally.

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2 hours ago, Henrik9979 said:

Just to make sure, have you tried to remove the small bios battery?

 

Steps you can try.

Remove any power source from the computer, also the battery.

 

Remove the bios battery.

 

Hold the powerbutton for 30 sec to drain remaining power from the system.

 

Put the bios battery back.

 

Plug you power cable into the computer.

 

Do not insert normal battery yet.

 

Try boot the laptop.

 

 

It should give a 5 beeps beepcode.

 

Turn off the computer again by holding the power button. 

 

Now hold the "FN" key on the keyboard down and turn on the computer.

 

It should turn on for 5 seconds and restart. Keep holding the "FN" key, can't remember when to let go.

 

Now it should boot normally.

Hi ,Thank you for your response. I tried all the steps you mentioned but unfortunately it didnt work, when I turn off fastboot in bios strangely system boots without flashing or on/off display but the boot time is longer than when I only boot from msata with fast boot on in bios !!!! I really lost  now .......... :(

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I think I understand your problem.

The problem is you version of Windows isn't for UEFI.

If bios has not been set to UEFI and installed Windows, then it will not boot if set to UEFI. It sounds like you have more than one Windows installed, and that you have set bios to try boot from the ssd first. The reason because it flashes 3 times is that it try to flash from the ssd but it fails and it tries again before trying to boot from the normal harddrive.

The only way I know to fix this is reinstalling Windows. When coming to the screen where you have to choose boot partition. Format the boot drive (maybe the other drives needed formatting too). Make sure to set bios to UEFI first.

 

If you can't get to format it to UEFI.

Then I know you to can do it trough command prompt. There you also can see what disk is UEFI ready.

But enter command prompt when booting from a installation disk or floppy drive.

  1. Turn off the PC, and put in the Windows installation DVD or USB key.

  2. Boot the PC to the DVD or USB key in UEFI mode. For more info, seeBoot to UEFI Mode or Legacy BIOS mode.

  3. When choosing an installation type, select Custom.

  4. On the Where do you want to install Windows? screen, select each of the partitions on the drive, and select Delete. The drive will show a single area of unallocated space.

  5. Select the unallocated space and click Next. Windows detects that the PC was booted into UEFI mode, and reformats the drive using the GPT drive format, and begins the installation.

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Doing it through command prompt:

  1. Turn off the PC, and put in the Windows installation DVD or USB key.

  2. Boot the PC to the DVD or USB key in UEFI mode.

  3. From inside Windows Setup, pressShift+F10 to open a command prompt window.

  4. Open the diskpart tool:

     
     
    diskpart
    
  5. Identify the drive to reformat:

     
     
    list disk
    
  6. Select the drive, and reformat it:

     
     
    select disk <disk number>
    clean
    convert gpt
    exit
    
  7. Close the command prompt window.

  8. Continue the Windows Setup installation.

    When choosing an installation type, select Custom. The drive will appear as a single area of unallocated space.

    Select the unallocated space and click Next. Windows begins the installation.

Btw maybe you only need to format the ssd to UEFI.

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I did fresh install win 10 when UEFI was enabled, system has currently one OS, OS partition is GPT. I had OS installed previously in my 2nd ssd  which I later formatted, could that be an issue ? when I go to disk management it says two of the drives has MBR ???  I am pulling my hair :(   

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