Video Signal - Mitsubishi Electric SD420U Service Manual

DIAGNOSIS FLOW CHART

Video signal :

Computer no signal.
Check
source.
Normal
Check
cable.
Normal
Computer
mode
input.
Normal
Replace PCB-MAIN.
Abnormal
Turn on source.
Abnormal
Replace cable.
Abnormal
Chang to
computer mode.
Video no signal.
Check
source.
Normal
Check
cable.
Normal
Video
mode
input.
Normal
Replace PCB-MAIN.
- 1 -
Abnormal
Turn on source.
Abnormal
Replace cable.
Abnormal
Chang to
video mode.