Read LG 32LG700H (CHASSIS:LA80A) Service Manual online
1. Power-Up Boot Fail
2. No OSD
- 15 -
TROUBLE SHOOTING
Check P800 All
Voltage Level (5V, 12V, 16V).
Check power connector and
RL_ON signal OK ?
Replace Power board.
Y
N
Y
Check IC1301 RESET and
UPDATE pin.
Check switch SW1300, SW1301.
Y
N
Check X1300 Clock
7.37MHz.
Check X1300 application circuit
or Replace X1300.
Y
N
Check IC1300 IIC
communication state.
Check IIC line or replace IC1300.
N
Check IR input state of IC1301
23pin.
Check IR board.
N
Y
Re-download PTC Micom.
Y
Check LVDS Cable.
Check LCD Module
Control board.
Y
Replace Cable.
N
Check P800 All
Voltage Level (5V, 12V, 16V)
Check power connector and
RL_ON signal OK ?
Replace Power board.
N
Y
Check Q401 output
Voltage(12V)
Voltage(12V)
Y
Check Q401 application circuit
or replace Q401.
N
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