LG CM4520 Service Manual page 22

NO POWER
If the unit doesn't work by no power problem, repair the set according to the following
guide.
1-2. D929
1-2-1. Solution
Please check and replace D929 on SMPS board.
1-2-2. How to troubleshoot (Countermeasure)
1) Check the Anode-Cathod Voltage of D929 with a digital multi-meter, it is normally 0.2 ~ 0.3 V.
If it doesn't have any voltage, it's destroyed. Replace it with a new one.
1-2-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< SMPS schematic diagram >
3-3