| Symptom | Likely Area | Component Check | |---------|-------------|------------------| | No power, fuse blown | Primary side | Bridge rectifier, main MOSFET, PFC diode | | Standby LED on, but no backlight | LED driver | Check LED current sense resistors, boost MOSFET, LED connector voltage | | TV turns off after a few seconds | Over-voltage protection (OVP) | One or more LED strings open – measure LED+ voltage | | Buzzing noise, no picture | PFC stage | Check PFC controller, feedback resistors, bulk capacitor |
The primary section of this board contains live mains voltage (up to 400V DC). Always discharge the main capacitor and keep fingers away from the "hot" side of the board while powered. Vestel 17IPS62 Schematic Overview | PDF - Scribd vestel 17ips62 schematic new