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Only for training and service purposes.
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL
When you turn on your set, it will blank / no message on front panel, and stand-by LED doesn’t work.
1-3. LCD System power (No 5.1 VA, VCC_5V, 3.3 VA, 12 V)
1-3-1. Solution
Replace MAIN/ FRONT board.
1-3-2. How to troubleshoot (Countermeasure)
1) Please check CNF51 5.1 VA(pin2), VCC_5V(pin4), 3.3 VA(pin6), 12 V(pin9).
2) If 5.1 VA, VCC_5V, 3.3 VA, 12 V are abnormal, replace MAIN board.
3) If 5.1 VA, VCC_5V, 3.3 VA, 12 V OK, replace FRONT board.
1-3-3. Service hint (Any picture / Remark)
< MAIN board top view >
CNF51
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