This will work provided the BIOS BootBlock isn't screwed up while your Main BIOS Image is gone so remember when flashing DO NOT FLASH the bootblock.
The bootblock is to initialize emergency BIOS recovery for some reason the BIOS screwed up.
Download the CrisDisk here.
Do the following on a spare working computer to prepare the BIOS Recovery Drive:
Rename a working copy of the BIOS to bios.wph.I have tried this with Aspire 4530.
UnZip & Extract CrisDisk to a folder called CrisDisk.
Copy and Paste the bios.wph inside the folder
(Remember to replace the sample bios.wph in the folder with your working BIOS!).
Plug a USB Floppy Disk with a Floppy Disk inside.
You can try using a Thumbdrive but the chances of working with a Floppy Disk is higher.
Right Click and run and WinCris.exe with Admin Permission.
It will format the floppy, copy the MiniDOS files inside with the bios.wph to create a emergency BIOS Recovery Disk.
Do the following on the Computer which BIOS you need to recover:
Plug in the prepared USB Floppy Drive to the machine you need to recover the BIOS from on the left USB port which is the motherboard main USB (There are 2 such ports on the same side).
Remove battery and AC Adapter.
Press and hold Fn+Esc then plug the AC Adapter in while holding Fn+Esc.
Press the Power Button Once and release while holding Fn+Esc.
You should see the lights flashing meaning the laptop is in BIOS Recovery Mode.
The USB Floppy drive should be lighted up and you should hear the floppy drive reading after that you can release Fn+Esc.
After a while you should see either it power off itself or the laptop lights stop flashing.
Remove the AC Adapter, USB Floppy Drive.
Plug back the AC Adapter your laptop should be working again.
Insyde BIOS recovery is different.
1)EFI doesn't need a bootable thumbdrive because EFI uses GUID Partition Tables just a normal partition will be ok (I think).
2)You need to rename the EFI to the correct name so recovery bootblock will identify the correct firmware.