LED TV Power Supply Board Repair in Hosur
Restoration of switched-mode power supplies, filter capacitors, switching transistors, and surge protection circuitry for dead televisions.
Component-Level SMPS Fixing for Dead & Surge-Damaged TVs
The Switched-Mode Power Supply (SMPS) converts standard 230V AC mains electricity into tightly regulated DC voltages required by the television: typically +5V standby, +12V for audio and mainboard processing, and +24V to +120V for the backlight array. Voltage fluctuations, lightning spikes, and heat degradation frequently strain these high-voltage circuits.
At SM Electronics in Hosur, we test power supply boards under full dummy electrical loads. We replace bulging or high-ESR electrolytic capacitors, shorted Schottky diodes, blown ceramic fuses, and PWM switching controller ICs with industrial-grade parts.
Common Power Faults We Fix on Our Hosur Bench
Hosur Workshop Desk
Frequently Asked Questions · TV Power Supply Repair
Why won’t my TV turn on at all, even without a standby light?
When a television shows zero signs of life (no standby light, no relay click), the fault almost always originates in the primary stage of the SMPS power supply board. Common culprits include blown anti-surge fuses, shorted rectifier bridge diodes, or open-circuit primary switching MOSFETs.
Why is my TV making a repetitive clicking sound inside?
A repetitive clicking noise indicates that the power supply’s protection circuit is tripping into auto-shutdown mode because of a short circuit on the secondary voltage rails (+12V or +24V). We isolate the shorted secondary diode or capacitor and restore clean DC power.
Can power boards damaged by thunderstorm electrical surges be repaired?
Yes! Lightning and grid surges usually take out the Metal Oxide Varistor (MOV), primary fuse, and input bridge rectifier. In over 85% of cases, component replacement restores full operation without requiring an entire new power board.