Sharp PN-L803C Service Manual page 134

4) When the following OSD is displayed, the EDID data needs to be written.
Move the cursor to [YES] and press [ENTER] button.
EDID UPDATE
Current EDID is not latest.
Do you want to update the EDID?
Caution:
Please check that all video cable
Is not connected.
5) When the EDID data is written successfully, the displayed menu moves to the Service Menu 2.
When the EDID data is failed to write, the following message is displayed.
Confirm that the video cables are not connected to the monitor and perform the writing procedure again.
Failed to Update the EDID.
Please Update again.
[ NO ] [ YES ]
OK...[ENTER] BACK...[RETURN]
PN-L803C_80TC3 FIRMWARE UPDATE PROCEDURES 5 - 11