Acer B223PWL Service Manual page 59

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S9. Select the EDID folder. Select ACER B243PHL and ACER V243PHL.
S10.LOad EDID successful. In the EDID tool, you can know the EDID information.
S11.Tick the "Only connect VGA" and "Write SN", and type in the 22 digit S/N.