LG LAS950M Service Manual page 22

NO POWER PROBLEM
If the unit doesn't work by no ±PVDD problem, repair the set according to the following guide.
1-2. No AMP power
1-2-1. Solution
Replace F901, Q901 on SMPS board.
1-2-2. How to troubleshoot (Countermeasure)
1) Check if the fuse F901 is open or short-circuit.
2) Check the Drain-Source or Drain-Gate, Gate-Source Resistance of Q901 with a digital multimeter.
  If it is short condition, it's destroyed. Replace it with a new one.
(Please replace FET at the same time although several FET is OK)
1-2-3. Service hint (Any picture / Remark)
F901
If F901 is not short-circuit,
replace it with a same specifi cations one.
ONE POINT REPAIR GUIDE
Q901
If Q901 is short-circuit,
replace it with a new one.
2-3