42LD550 (CHASSIS:LA02B) - LG TV Service Manual (repair manual). Page 12

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4.4 LAN PORT INSPECTION(PING TEST)  
4.4.1. Equipment setting 
1) Play the LAN Port Test PROGRAM. 
2) Input IP set up for an inspection to Test  
Program. 
*IP Number : 12.12.2.2 
4.4.2. LAN PORT inspection  (PING TEST) 
1) Play the LAN Port Test Program. 
2) connect each other LAN Port Jack. 
3) Play Test (F9) button and confirm OK Message. 
4) remove LAN CABLE 
5.  EDID (The Extended Display
Identification Data) / DDC (Display
Data Channel) download 
5.1 Overview    
It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”. 
5.2 Equipment 
• Adjust remocon. 
• Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need. 
5.3 Download method 
1) Press Adj. key on the Adj. R/C, 
2) Select EDID D/L menu. 
3) By pressing Enter key, EDID download will begin 
4) If Download is successful, OK is display, but If
Download is failure, NG is displayed. 
5) If Download is failure, Re-try downloads. 
•Caution) When EDID Download, must remove RGB/HDMI
Cable.
 
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