Acer M5-481TG Service Manual page 88

Figure 2-48. Write Mainboard Serial Number
8. To read/write F/G serial number, do the following:
 Type in WQDMI /Rsn to read the F/G serial number (Figure 2-49).
Figure 2-49. F/G Serial Number Menu Item
 Type in WQDMI /Wsn [string] to write the F/G serial number (Figure 2-50).
The string is a new F/G serial number.
Example: WQDMI /Wsn 111111111111111111111
2-33 Acer M5-481TG System Utilities