InsydeFlash for DOS (Acer Aspire S7-391)

Discussion in 'BIOS Mods' started by Spinete, Mar 15, 2014.

  1. Spinete

    Spinete MDL Novice

    Mar 15, 2014
    Hi guys,

    I have an Acer Aspire S7 with Ubuntu. No Windows at all. Acer rolled out some interesting BIOS updates for my laptop (S7-391) which improve the fan noise (2.18, more info here:
    I have been trying to update my BIOS using FLAs**t.EXE through FreeDOS. I have been googling a lot and I was able to 7zunzip the .fd file (isflash.fd) from the update binary that Acer supplies only for Windows 8 (.EXE).
    The point is that after booting with FreeDOS and try to flash isflash.fd I get the following error from FLAs**t (1.4b, got it from


    Insyde Flash Utility for InsydeH2O
    Error: This ROM file size isn’t correct.
    Error: ROM size: 4728c0 Current BIOS size: 100000

    Any ideas? Do I need any specific parameter? Some people say to use /ALL in order to flash the whole area. I know that flashing BIOS can be very dangerous, so that is the reason because I want to ask before proceeding.

    Any help will be appreciated.
    Best regards,
  2. magpiper

    magpiper MDL Novice

    Jun 5, 2014

    Were you able to resolve this issue? I too am suffering from a boot issue regarding a bug in BIOS. Chatted with Acer support and requested a DOS flash utility. They said I would have to send the unit in for repair. 18+ years in the industry and this is a first for a BIOS update. Have never been fond of Acer support.
  3. Tito

    Tito Super Mod / Adviser
    Staff Member

    Nov 30, 2009
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...