Sony TV Fault Diagnosis: Why Your Bravia Won’t Turn On, Won’t Show a Picture, or Has No Sound
Sony Bravia TVs have a reputation for picture quality and build quality — but they have their own fault patterns, their own error indicators, and their own diagnostic procedures. A Sony TV that won’t turn on doesn’t necessarily have the same fault as a Samsung with the same symptom. And a Sony that won’t produce sound may have a different cause from the obvious.
This guide is written specifically for Sony Bravia owners. It covers the faults Sony TVs actually develop — backlight failure, power supply faults, main board issues, Android TV and Google TV software problems, and sound faults — with Sony-specific diagnostic procedures rather than generic television advice.
The most useful Sony-specific tool is the standby LED flash pattern. Sony Bravia TVs use a blinking standby light to report specific faults, and the number of blinks points to a particular system. Two blinks, six blinks, eight blinks — each tells you something different. The guide explains how to count the flashes, what each pattern means on Sony models, and how to use that information to narrow the fault before you spend anything on parts.
Common Sony Bravia Problems
TV won’t turn on at all — no standby light, no response to power or remote
Standby light blinking in a pattern — Sony’s diagnostic code system
Sound but no picture — black screen with audio working
Picture but no sound — the inverse fault
TV turns on then shuts down — powers up briefly then cuts out
No picture on any input — HDMI sources and internal apps both fail
Smart features not working — Android TV or Google TV apps crash, freeze, or won’t load
Wi-Fi won’t connect — network faults on smart models
Screen has lines or bands — horizontal or vertical artefacts
Backlight failure — dim or dark picture with faint image visible under a torch
Sony-Specific Fault Indicators and Known Weak Points
Sony Bravia TVs use a standby LED flash pattern to report faults. The LED on the front of the TV blinks a specific number of times in a repeating cycle, and the count indicates which system has failed. Common patterns on Sony Bravia models include:
2 blinks — power supply or main power fault
3 blinks — main board or system fault
4 blinks — backlight or panel driver fault
5 blinks — panel or T-Con fault
6 blinks — backlight inverter or LED driver fault
8 blinks — main board or power supply fault
14 blinks — panel or main board failure
The exact meanings vary by model and chassis, and Sony doesn’t publish a universal table. The guide explains how to count the pattern correctly, how to look up the specific meaning for your model, and how to use the result to direct your diagnosis.
Beyond the codes, Sony Bravia models have recognisable failure patterns:
LED Bravia models (X-series, W-series) — backlight failure is the most common fault. Individual LEDs in the backlight strip burn out and break the series string, causing the backlights to shut down. The screen goes black while sound continues.
Android TV and Google TV models (2015 onwards) — software faults are common. Apps crash, the interface freezes, or the TV becomes unresponsive. Most resolve with a factory reset or firmware update, but a failed main board also produces similar symptoms.
Older Bravia LCD models — power supply capacitor failure and T-Con board faults are the usual suspects, particularly on sets over eight years old.
Bravia OLED models (A-series) — panel-level faults are the concern. OLED panels are expensive and replacement rarely makes financial sense.
Major Diagnostic Areas Covered
Sony standby LED flash codes — how to count them, interpret them, and use them to identify which system has failed
Backlight and power supply diagnosis — testing the power supply output rails, backlight voltage, and LED strip continuity
Main board diagnosis — including how to distinguish a software fault from a hardware failure
Android TV and Google TV resets — factory reset, cache clearing, safe mode, and firmware recovery procedures
Sound and connectivity faults — audio output settings, speaker testing, Wi-Fi and Bluetooth diagnosis
Panel failure identification — how to confirm when the LCD or OLED panel itself has died
T-Con board and ribbon cable checks — test point voltages, connector inspection, and replacement
Repair cost estimates — typical parts and labour costs for every Sony fault covered
Repair-or-replace framework — with thresholds adjusted for Sony’s higher replacement cost
What the Complete Guide Covers
This is a full diagnostic reference covering Sony Bravia LED, LCD, and OLED televisions across the major model ranges, with the same structure as our appliance and brand guides:
A full explanation of Sony’s LED flash code system
Step-by-step testing procedures for the power supply, backlight, and main board
Android TV and Google TV reset and recovery procedures
Backlight strip testing and replacement guidance, including the correct disassembly sequence
T-Con board diagnosis with test point voltages
Sound fault diagnosis covering speakers, audio board, and settings
Full repair cost reference table
Repair-versus-replace framework with worked examples across screen sizes and model ranges
Model-specific notes covering Bravia X, W, A, and Z series differences
Repair vs Replacement
Sony Bravia TVs cost more to replace than most brands, which changes the repair calculus. A 55-inch Bravia that cost $1,200 new justifies repairs that a $400 budget TV would not.
Backlight strip set — $40 to $90. Worth doing on any Bravia under eight years old.
Power supply board — $50 to $120. Worth doing on any Bravia under ten years old.
Main board — $120 to $250. Worth doing on any Bravia under seven years old.
T-Con board — $40 to $80. Always worth doing when it’s the fault.
Panel failure (LCD) — replacement typically costs more than a new TV. Bin decision.
Panel failure (OLED) — significantly more expensive than LCD. Bin decision in almost every case.
The guide gives you the threshold for each fault, with worked examples across the Bravia range.
Frequently Asked Questions
Why won’t my Sony Bravia turn on?
Check the standby light first. If it’s blinking in a pattern, count the blinks — that’s Sony’s fault code system. If there’s no light at all, the power supply or power cord is the likely cause.
What do the blinking lights on my Sony TV mean?
Sony Bravia TVs blink the standby LED in a repeating pattern to report faults. The number of blinks indicates which system has failed — power, main board, backlight, or panel. The guide explains how to count them and what each pattern means.
Why does my Sony TV have sound but no picture?
The LED backlight has likely failed. The panel is still creating the image, but there’s no light behind it. Shine a torch at the screen — if you can faintly see the picture, the backlight is the fault.
Why is my Sony TV’s Android TV not working?
Software faults on Android TV and Google TV are common. Start with a factory reset, then check for firmware updates. If the fault persists after a reset, the main board may have failed.
Is it worth repairing a Sony Bravia?
Usually yes. Sony TVs cost more to replace than most brands, so repairs are justified on a wider range of faults. The exceptions are panel failures, which almost always cost more than a new TV.
Get the Complete Sony TV Fault Diagnosis Guide
Stop guessing what the blinking light means. This guide decodes Sony’s fault indicators, walks through every common Bravia fault, and gives you the repair-or-replace answer.
Sony TV Fault Diagnosis Guide — $7.95
Know the fault. Fix it properly. Or know when it’s time for a new one.
Related Guides
TV Turns On But No Picture — $7.95
The generic TV guide covering the torch test, LED backlight strips, power supply, T-Con board, and panel diagnosis. Useful if you want the fullest explanation of the backlight fault, which is the most common Bravia failure.
Samsung TV Fault Diagnosis Guide — $7.95
The equivalent brand guide for Samsung. Useful if you own more than one brand of TV, or to compare fault patterns across brands.
Hisense TV Fault Diagnosis Guide — $7.95
The Hisense equivalent. Covers backlight, power, and software faults with Hisense-specific procedures.
LG Fault Diagnosis Guide — $7.95
The complete LG reference covering six fault types including no picture, vertical lines, no signal, no sound, and app failures.
Bluetooth Speaker Won’t Charge — $7.95
Useful if your Bravia is paired with a Sony soundbar or Bluetooth speaker and you’re diagnosing audio faults across both devices.