Real component-level screen, backlight, and motherboard restorations from our Kolkata workshop.
Issue: Severe vertical colored lines, horizontal bands, and flickering double display across the entire panel.
Fix: COF driver micro-laser bonding and panel driver IC replacement. Restored factory sharpness.
Issue: Sound and channels working clearly, but screen is pitch black due to burnt LED backlight strips.
Fix: Dismantled 55-inch display assembly and installed brand-new copper heat-sink OEM LED strip array with 1-year warranty.
Issue: Completely dead, red standby LED light not turning on after Kolkata monsoon thunderstorm power surge.
Fix: Component-level micro-soldering, replaced primary switching MOSFETs, bridge rectifier and fuse capacitors.
Issue: TV stuck in continuous reboot loop on Sony logo, failing to load Android TV OS.
Fix: Main SOC re-soldered with BGA rework station, firmware NAND IC reprogrammed to latest factory release.
Issue: Water droplet seepage from bottom bezel caused corroded COF ribbon and vertical colored columns.
Fix: Cleaned corroded traces under microscope, laser-bonded new original COF ribbon tab to the glass substrate.
Issue: Turntable spins and timer runs, but food remains completely cold without any heating.
Fix: Tested and replaced burnt 2M214 high-voltage magnetron, installed high-voltage safety diode and calibrated inverter circuit.
Issue: Right audio channel crackling and cutting off into protect mode at higher volume levels.
Fix: Replaced blown complementary pair power output transistors, biased idle currents, and resoldered dry audio joints.
Issue: Display turned deep blue/purple with noticeable dark spots across the center of the screen.
Fix: Installed full set of genuine OEM 6V high-lumen pure white lens LED backlight strips with uniform diffusion.
Issue: Clicking relay sound every 5 seconds, standby red light pulsing twice, TV not powering on.
Fix: Replaced shorted secondary filter electrolytic capacitors and upgraded bridge rectifier to heavy-duty specification.
Issue: Stuck on TCL animated dots screen indefinitely after an interrupted automatic software update.
Fix: Connected RT809H programmer via ISP header, reflashed factory EMMC dump, verified HDMI 2.1 HDCP keys.
Issue: Loud humming noise and burning plastic smell inside microwave chamber when start button pressed.
Fix: Replaced shorted high-voltage step-up transformer, replaced mica waveguide sheet, restored touch membrane keypad.
Issue: Severe bass distortion and buzzing vibration sound on bluetooth and AUX audio inputs.
Fix: Repaired Class-D audio amplifier chip decoupling stage, swapped bulging smoothing caps, clean stereo output restored.
Issue: Fine horizontal lines and ghosting artifacts showing when watching high frame-rate content.
Fix: Micro-cleaned panel LVDS and FFC flat flex connectors with contact restorer, balanced gamma reference voltages.
Issue: Flashlight test showed video image on panel, but screen is 100% black due to dead backlight circuit.
Fix: Diagnosed open circuit on LED string 2. Installed original Sony aluminum substrate backlight set.
Issue: TV completely dead after voltage fluctuation, mains fuse blown inside SMPS board.
Fix: Installed new 650V switching MOSFET, PWM controller IC, and upgraded varistor surge protector.
Issue: No audio output through speakers, headphone jack, or optical output. Picture working normally.
Fix: Replaced audio amplifier driver IC, reflowed DAC converter circuit with lead-free thermal profile.
Issue: Error code F-11 displaying on digital display, microwave shuts down after 3 seconds of starting.
Fix: Repaired smart inverter PCB board, replaced door interlock micro-switch assembly and safety thermal fuse.
Issue: Protection fuse blowing instantly when master power switch flipped on, zero audio output.
Fix: Extracted and replaced 4 damaged 2N3055 power output transistors, cleaned heavy heat sink, recalibrated output transformer.
Issue: Wide magenta and green vertical bars blocking right half of screen after mild physical impact.
Fix: Laser micro-bonding repaired severed microscopic glass tracks on side COF driver ribbon without panel replacement.
Issue: Half screen dark (left side dimmed), dark shadowy patches noticeable on light backgrounds.
Fix: Stripped optical diffusers, replaced failing 12-strip LED array with premium copper-backed strips for thermal longevity.
