Polaroid FLM-3234B - Connecting External AV Devices

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3. Troubleshooting Flow Chart
STEP 1.
NO NO
YES YES
YES YES
NO
NO
NO
YES YES
NO
YES
NO
OK NO YES
No Display
( Black )
LED ON ?
Push the power
ON/OFF switch
LED Color
change ?
Check IR/LED
board J1,U1,D1
Check Keypad
Board J1 pin1,
pin2.
LCD TV
ON?
Check
Video&
Audio
Function
Make sure the
LVDS
connection of
LCD Panel is
fine
CN3 Pin7
Active High?
Check the D-SUB
37Pin board CN3-
Pin7
Check Inverter
Power (24V) of
LCD Panel
,
OK?
B
Display ?
Check AC
Socket ?
Change AC
Socket Fuse
C
A
Replace
Control Box
Check Video&
Audio Function