3-10
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE ON VFD
When you turn on your set, it will blank / no message on VFD, and it will not boot-up.
2-6. IC504 (Serial Flash Memory)
2-6-1. Solution
Replace IC504 on MAIN board.
2-6-2. How to troubleshoot (Countermeasure)
1) Please check physical status of IC504 on your eyes.
2) Check the VCC (3.3 VA) and of IC504.
If 3.3 VA is abnormal, please check IC303.
3) Check pin1, 2, 5, 6 of IC504.
If the signal doesn’t come out, check R542, R543, R544 resistor.
4) If resistor is OK, replace IC504.
2-6-3. Service hint (Any picture/ Remark)
< MAIN board bottom view >
IC504
(Serial Flash)
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