6-2
1. No Display On Screen
Note: 1. If replace “Main-Board”, Please re-do “DDC-content” programmed & “White-Balance”.
2. If replace “Power Board” only, Please re-do “ WHITE-Balance”
OK
Measured CN201 PIN 5/6= 12V?
Measured CN201 PIN 9/10= 5V?
Measured U102 PIN 50= 3.3V?
Check Correspondent component.
Is there any shortage or cold solder?
OK
Disconnected the Signal cable (Loose the
Signal cable), Is the screen show “Cable Not
Connected”?
Connected the Signal cable again,
Check LED status.
Green
Replace IC104
Flash Rom
NG
Connected the Signal
cable again Check LED
status.
Check Power switch is in Power-on
status, and check if Power switch had
been stuck?
Orange
OK, Keyboard no stuck
Orange
Green
Check the Wire-Harness from CN503
Measured RGB (R106, R107,
R108) H, V Input at U102 PIN 95,
96, Was there have signal?
Check
Correspondent
component
short/open
(Protection Diode)
NG
OK, Wire tight enough
Check Panel-Power Circuit Block
OK, Panel Power OK
Check U102 Data-output Block
Replace Power board and Check
Inverter control relative circuit
Re-do White balance adjust
Measured Crystal X102 (14.318MHz)
OK
Replace U102 (ZAN3XL)
OK
OK, IC104 data OK
NG
OK
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