No Booting When Power On The Set - LG CM4330 Service Manual

2. NO BOOTING WHEN POWER ON THE SET

The set doesn't work when press the power button on the front board or the remote
control.
2-1. FLASH MEMORY
2-1-1. Solution
Please check and replace IC102 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Check 3.7 V to CN101 and CN105 in standby mode.
If there is no 3.7 V, check the SMPS.
2) Check 5.6 V, 12 V, F+, F- and PVDD when power on the set.
- If the set doesn't work regardless of what the KEY1 changes high to low while pressing the power button.
X100 and X101 work normally but, if you can not power on the set, replace IC101 with a new one on
the MAIN board.
2-1-3. Service hint (Any picture / Remark)
KEY1(R152)
ONE POINT REPAIR GUIDE
IC101
< Signal check point >
PWR CTRK(R119)
3-4