Acer RA19WAANU Service Manual page 35

ACER X193HQ
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4. Choose "WRITE" from menu then select "Scan S/N And
Write EDID And Test DDC"
5. Key in series number(22 characters) in the input column
and below empty column.
Press write button after key in S/N
6. When EDID was written successfully that will show below
message on the screen
7. Writing EDID Process (continued)