Help recovering Acer Aspire 4750G BIOS

[MyAngelMegu]

Laptop: Acer Aspire 4750G with Phoenix BIOS
My BIOS has issue where it won't go further 80% progress/load bar (basically won't boot) since I installed Windows.
I cannot enter Setup or Boot menu. Pressing F2 makes usual speaker beep but stuck at Please wait at same 80% progress bar.
I reset CMOS battery, still same issue.

So I want to crisis recover this BIOS. I used WinFlash on my PC to get the BIOS fd and wdh files. here is how it looks
05/12/2025  01:50 AM    <DIR>          .
05/12/2025  01:51 AM    <DIR>          ..
05/12/2025  12:42 AM        4,194,304 BIOS1.WPH
05/12/2025  12:42 AM          514,728 environment.dll
05/12/2025  12:42 AM        2,752,512 FvRecovery.fd
05/12/2025  12:42 AM            1,088 OemSlp20.efi
05/12/2025  12:42 AM            8,672 Slp20.pfae
05/12/2025  12:42 AM            86,301 winflash.chm
05/12/2025  12:42 AM          576,168 WinFlash.exe
05/12/2025  12:42 AM              142 WINFLASH.INI
05/12/2025  01:50 AM              870 WINFLASH.LOG
05/12/2025  12:42 AM            21,160 WinFlash.sys
05/12/2025  12:42 AM            23,720 WinFlash64.sys
05/12/2025  12:42 AM          137,896 WinFlashUI.dll
              12 File(s)      8,317,561 bytes
I think my key combo to enter crisis mode is Fn+Esc then power button. When in this combo the screen stays off but there is power button and fan noise and no HDD led. Just in case I unplug HDD+SSD.
I copy over BIOS1.wph only - nothing, laptop stuck at black screen with NO BLINKING LED
I copy over FvRecovery.fd - nothing , laptop stuck at black screen with NO BLINKING LED
I copy over BIOS1.wph and rename it to BIOS.wph - nothing , laptop stuck at black screen with NO BLINKING LED
I copy over BIOS1.wph and FvReovery.wph then rename both to BIOS.wph and BIOS.fd - nothing , laptop stuck at black screen with NO BLINKING LED
BIOS.wph + BIOS.fd + WinFlash.exe + WinFlash.sys - nothing , laptop stuck at black screen with NO BLINKING LED
I use wincrisis.1.0.0.4. BIOS-Mod instructions are weird. It asks me to plug in 2GB usb then press start, but that's not possible. It simply gives me error to select a project file or place a BIOS.WPH or BIOS.ROM + PLATFORM.BIN. I copy BIOS.WPH file to wincrisis.1.0.0.4, it works but still laptop stuck at black screen with no blinking led.

Note: I have no battery plugged. I plug usb first, then hold Fn+Esc, then while holding plug in AC plug then while holding Fn+Esc press power button. It stuck at black screen with no blinking led. Until few minute it shuts down regardless of how i format my usb or even not plug in. Turn it on and laptop boots up to same bad bios behavior - stuck at 80%

Possible Reason for BIOS issue: My BIOS is hybrid - it's legacy but can boot EFI. I was using Arch linux as EFI on SSD. then today I installed Windows on another HDD as EFI. When Windows installed, since then my BIOS was stuck at 80% progress and won't boot any OS or go BIOS Setup even after removing all hard disk. I'm guessing the boot menu is overloaded by EFI OS. Since I had 2 other linux distro installed in past, even after clean format of SSD they still show on Boot menu. maybe the final windows install overloaded it? i dont know.

please help me anyone on how to fix it. Original ACER BIOS link. I'm sorry I can't find support section so I'm posting on unlock section. sorry in advance.

[windfeng1314]

hi bro, is there any progress? I have encoutered the same problem.