How We Diagnose Sony TV Motherboard Faults

 How We Diagnose Sony TV Motherboard Faults – A Comprehensive Technical Guide by Refitec

(refitec.co.ke – Call/WhatsApp 0704843613)

Part 1: Introduction

• Importance of the motherboard in Sony TVs
• Why diagnosis is critical before repair/replacement
• Challenges unique to Sony TV motherboards
• Role of professional diagnosis vs DIY

Part 2: Understanding Sony TV Motherboard Architecture

• Overview of motherboard components (ICs, processors, capacitors, fuses, connectors)
• Signal processing pathway in Sony TVs
• Common weak points in Sony motherboards
• Difference between models (LCD, LED, OLED, Android TVs, Smart TVs)

Part 3: Common Symptoms of Motherboard Faults

• TV not powering on
• TV stuck in standby (blinking LED codes)
• No display but sound available
• No sound but picture available
• HDMI ports not working
• Remote sensor unresponsive
• Wi-Fi/Bluetooth not functioning
• Software/firmware-related crashes
• Overheating and shutdowns

Part 4: Tools and Equipment Needed for Diagnosis

• Multimeter use for power checks
• Oscilloscope for signal tracing
• ESR meter for capacitor testing
• Hot air station for IC replacement checks
• Soldering and rework tools
• Safety gear (gloves, antistatic wristbands, goggles)

Part 5: Step-by-Step Diagnostic Procedures

1. Visual Inspection
   • Burnt marks, bulging capacitors, corrosion
2. Power Supply Checks
   • Input/output voltage testing
   • Standby voltage verification
3. Fuse and Diode Testing
   • Locating short circuits
4. IC and Processor Health
   • Checking BGA solder cracks
   • Reflow/reball considerations
5. Connector and Cable Integrity
   • LVDS cable testing for display signals
6. Software/Firmware Diagnostics
   • Using service menus
   • USB/firmware update procedures
7. Signal Flow Tracing
   • Path from tuner to processor to display
8. Thermal Stress Testing
   • Identifying overheating components
9. Component-Level Replacement Testing
   • Swapping RAM, EEPROM, or tuner modules

Part 6: Model-Specific Diagnosis Notes

• Sony Bravia LCD TVs
• Sony Bravia LED TVs
• Sony OLED TVs
• Sony Android/Google TVs

Part 7: Safety Tips During Diagnosis

• High-voltage handling precautions
• Avoiding electrostatic discharge damage
• Safe desoldering practices
• Proper grounding and isolation
• Fire safety and emergency readiness

Part 8: When to Repair vs When to Replace

• Cost-benefit analysis
• Availability of genuine Sony spare parts
• Risks of counterfeit boards
• Long-term reliability

Part 9: Why Choose Refitec for Sony TV Motherboard Diagnosis

• Professional expertise in Sony TV repairs
• Availability of genuine spare parts
• On-site and workshop service options
• Customer testimonials
• Contact details: refitec.co.ke – Call/WhatsApp 0704843613

Part 10: Preventive Maintenance & Longevity Tips

• Keeping TV in ventilated space
• Regular dust cleaning
• Safe power supply practices (surge protectors)
• Software updates and resets

Part 11: Case Studies (Real-World Sony TV Repairs by Refitec)

• Example 1: Sony Bravia with no display
• Example 2: Sony OLED overheating
• Example 3: Sony Android TV software crash
• Example 4: HDMI port replacement success

Part 12: Frequently Asked Questions

• Can a faulty Sony TV motherboard be repaired or must it be replaced?
• How long does diagnosis take?
• What is the average cost in Nairobi?
• Do you provide warranties?

Part 13: Conclusion

• Summary of diagnostic process
• Importance of safety
• Encouragement to contact