Video Signal Troubleshooting - LG RD-JS31 Service Manual

Video Signal
Computer
No Signal
Check
Source
OK
Check
Cable
OK
Computer
Mode
Input
OK
Change Main
Board
21
NG
Turn on
Source
NG
Replace
Cable
Change to
NG
Computer
Mode
Video
No Signal
Check
Source
OK
Check
Cable
OK
Video
Mode
Input
OK
Change Main
Board
NG
Turn on
Source
NG
Replace
Cable
NG Change to
Video Mode
Chapter 4