Acer Legacy Boot Bug - Cannot boot anything

rafaeltoledo

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I have an Acer Aspire M5481T with a SSD 20Gb + 500Gb HD. When I bought it, I made it dual boot resizing it partition inside Windows and then installing Ubuntu. Ok, worked fine for last months. Now, after getting some bloatware that turned my dev tools broken, I needed to make a clean Windows installation. After playing around with its SSD, I opted to use the factory restore of the system. It gave me a "clean" Windows installation but, as expected, I lost grub as the boot manager. Trying to restore it, I changed the boot mode do Legacy instead of EFI. But now, I am not able to enter BIOS again, and I don't know which is the current boot order, as it only gets "frozen" in the Acer logo with options to enter Set-up with F2 or Boot Order with F12 (but no one of this options works). I tried to start with a Windows 8 installation disk, an Ubuntu installation disk or even a bootable USB (with Windows 8 and Ubuntu), but none of this options seems to be working. Anyone knows something I can try before attempting to send it to repair? Maybe a way to reflash or reset BIOS?
 

My Computer

System One

  • OS
    Windows 8.1
Try pressing and holding the Fn key, then the Function key (ie F2 or F12).
 

My Computer

System One

  • OS
    Linux Mint 17.2
    Computer type
    Laptop
    System Manufacturer/Model
    Toshiba Satellite C850D-st3nx1
    CPU
    AMD E1-1200 APU with Radeon (tm) HD Graphics 1.40 GHZ
    Memory
    12GB
    Graphics Card(s)
    AMD Radeon™ HD 7310 Graphics
    Sound Card
    Realtek HD
    Monitor(s) Displays
    LCD
    Screen Resolution
    1366 x 768
    Hard Drives
    Crucial M500 240GB SSD
    Mouse
    Logitech M525
    Internet Speed
    45/6 - ATT U-Verse
    Browser
    Google Chrome
    Antivirus
    None needed. It is Linux.
    Other Info
    Arris NVG589 Gateway; Router - Cisco RV320; Switch - Netgear GS108 8-Port Switch & Trendnet TEG-S50g 5-Port Switch; Access Points - Engenius ECB350, Trendnet TEW-638APB; NAS - Lenovo ix2-4; Printer - Brother HL-2280DW; Air Print Server - Lantronix XPrintServer

    A/V UPS - Tripp-Lite Smart 1500LCD 1500 Va/900 W.
I got user manual for your model and it tells F2 is your BIOS key. You can also try F8, F9, F10 key with or without Fn Key for boot menu.
 

My Computer

System One

  • OS
    Windows 8.1 x64 Enterprise
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Gigabyte g41 Combo
    CPU
    Core™2 Duo E8400
    Motherboard
    Gigabyte g41 Combo
    Memory
    4GB
    Graphics Card(s)
    builtin
    Sound Card
    builtin
    Monitor(s) Displays
    Samsung CRT
    Screen Resolution
    1024x768
    Hard Drives
    WD 500GB
    Browser
    Chrome
    Antivirus
    MS
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