09920-3 – Acer 4741G
The 09920-3 (Wistron) motherboard is found in the Acer 4741G, Acer Aspire 4741ZG and Acer HM42. The catalog lists 2 files for it: 1 BIOS file, 1 schematic and 1 EC firmware image.
The earliest file dates from May 2021 (Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive).
BIOS dumps 1
Schematics 1
Board facts
| Board number | 09920-3 |
|---|---|
| Designed by | Wistron |
| Platform group | 09XXX |
| First seen | 2021-05-31 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive |
| About the number | Wistron board numbers look like 15217-1; the first two digits usually indicate the design year. |
Laptops that use 09920-3
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the 09920-3 board?
09920-3 is a Wistron board number used by Acer.
Is there a boardview for 09920-3?
No boardview has been indexed for 09920-3 yet; the schematic is available on this page.
Which laptops use the 09920-3 board?
Files in the catalog link 09920-3 to the Acer 4741G, Acer Aspire 4741ZG and Acer HM42.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.