LG CJS45F Service Manual page 32

NO POWER
If the unit doesn't work by no power problem, repair the set according to the following guide.
1-2. D951
1-2-1. Solution
Please check and replace D951 on SMPS board.
1-2-2. How to troubleshoot (Countermeasure)
1) Check the anode-cathod voltage of D951 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