Hitachi L42X02A Service Manual page 44

SYMPTOM: NO AV2 PICTURE/NO AUDIO ABNORMAL
No AV2 Picture/No audio
Check if signal of AV
PCB RP3 pin 6
is normal
Yes
Replace Main PCB
SYMPTOM: NO HDMI PICTURE ABNORMAL
No HDMI Picture
Check if HDMI signal
of CN21is normal
Yes
Replace Main PCB
SYMPTOM: NO VGA PICTURE/NO VGA AUDIO ABNORMAL
No VGA Picture
No VGA Audio
Check if VGA signal of CN3 is normal
Check if VGA signal of JK6 pin 2,3 is normal
Yes
Replace Main PCB
No
Replace AV PCB
No
Replace HDMI wire
No
Replace VGA wire or Audio wire
44