Because this involves raw firmware binary files, the process requires physical access to the motherboard's BIOS chip: Locate the BIOS Chip
Verification and recovery steps
To install the BIOS file for the DA0ZASMB8D0 Rev: D motherboard (commonly found in the Acer Aspire 3 A315-21 ), you must use an external hardware programmer such as a da0zasmb8d0 rev d bios bin install
Before attempting any installation, confirm your board revision. The keyword specifies (Revision 4). Using a BIN file from Rev A, B, or C can permanently brick your device. Because this involves raw firmware binary files, the
The first rule is always to read and save the old, corrupted BIOS data. The old data is wiped from the chip. file is written to the chip using the programmer software. Verification: The first rule is always to read and
: Although BIOS updates shouldn't affect your data, it's always a good practice to back up your important files before proceeding.