LG BD390 Service Manual page 61

2. VFD DOESN'T DISPLAY (BD300 / BD390)
Timer board doesn't work. (abnormal display)
2-1. Solution
Replace ZD121 on SMPS board.
2-2. How to troubleshoot (Countermeasure)
1) Check PN101 in pin14 --> -29VA at power
2-3. Service hint (Any picture / Remark)
COMPONENT REPAIR GUIDE
3-48
VFD voltage