Step 5 / 14
How does an LED TV power board work?
In standby only a small part of the board runs. Switch to "On" at the top right and watch which sections wake up when you press the remote. Then use "Find the fault" to track down the faults repairers see every day.
🔒 This content is in the repair pack
The repair pack unlocks all interactive content in one go: diagrams and current flows, the Repair Workshop, simulations, concepts, IC guides, the Component Library and comparison guides. One sample in every section is free.
Repair pack: 5,000 ₺, members get 10% off → 4,500 ₺. Or 1-week access for 1,000 ₺.
⚠ Safety: Everything in the red area is at mains voltage, and the bulk capacitor can stay above 300 V after unplugging. Discharge it before measuring, and use an isolation transformer if you can.
Next step: Step 6How does a PC power supply (ATX) work?→