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Check 5
Start
Check input signal.
Video 1/ Video 2 input signal are abnormal.
Power lamp : Lighted green
(10 sec or more)
Can this unit
select only RGB mode?
Is signal input level
normal?
Microcomputer
peripheral circuit
faulty
Yes
No
Is picture
displayed on screen
normal when new video
PCB unit installed ?
Video PCB Assy
faulty.
Yes
No
Signal processing
circuit faulty.
Replace Main/Digital
PCB Assy.
Yes
No