Akai LCT3785TAJ Service Manual page 40

PCB failure analysis
1. CONTROL : a. Abnormal noise on screen. b. No picture.
2. MAIN : a. Lacking color, Bad color scale.
b. No voice. (Make sure status: Mute / Internal, External speaker)
c. No picture but with signals output, OSD and back light.
d. Abnormal noise on screen.
3. POWER : NO picture, no power output.
4. Back Light : a. No picture.
b. Flash on screen.
c. Darker picture with signals.
5. ATV Tuner : a. No ATV Noise
b. No ATV signals
6. ATSC: a No ATSC TV signal
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