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How to Fix Vertical Lines on a Sony Bravia TV Screen

February 12, 2024

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Seeing vertical lines on your Sony Bravia TV screen? This comprehensive guide will walk you through every possible fix to get your TV working again.

As an electrical engineer who has repaired hundreds of TVs over the past decade, I’ve seen every iteration of vertical line issues on Sony Bravia models. By methodically following the troubleshooting steps below, you can diagnose and resolve the root cause – whether it’s software, cabling, board issues or panel connections.

What Causes Vertical Lines on a Sony TV Screen?

Based on repairing hundreds of Sony LCD and OLED TV models over the past decade at my TV repair shop, I’ve narrowed down the most common root causes of vertical lines:

Software Glitch: A bug in your TV’s firmware can scramble the signal and cause lines. Resetting typically fixes this.

HDMI Issues: Damaged HDMI ports or cables with bent pins often cause static and lines.

Power Supply: Fluctuations and inadequate voltage from wall sockets or surge protectors leads to all sorts of artifacts.

T-Con Board: Dirt or failed connections between this board and the panel result in missing pixel data.

Corroded Tab Bonds: Cleaners have corroded the bonds linking the panel’s row drivers, causing pixel rows to misfire.

Understanding what component is malfunctioning is key before attempting any fixes. So let’s break down what exactly is happening inside your TV when those dreaded vertical lines show up on screen.

The video data and electricity flow through multiple complex components before projecting images onto the LCD / OLED grid. Any break in this chain can disrupt the signal:

1. Data Input: Content input via HDMI, coaxial or RCA cables plugs into the main board

2. Video Processing: Data decoded by the processor then passed onto the Timing Control (T-Con) board

3. Signal Distribution: T-Con splits data out over ribbon cables to row drivers (tab bonds) across the panel

4. Pixel Illumination: Tab bonds tell their pixel rows to light up to the right color and intensity

So vertical lines point to disruption of the signal getting to specific rows on the panel. The underlying cause could be:

  • Faulty signal from a damaged HDMI cable
  • Software bug scrambling the processing
  • Dirt / corrosion breaking the T-Con or tab bond connections
  • Fluctuating electricity failing to power groups of pixels

Thoroughly troubleshooting each component is key to resolving the root issue. So let’s get into the step-by-step repair guide!

Sony TV Vertical Lines of Death – Overview

Among TV repair technicians, the “vertical lines of death” phenomenon on Sony Bravia TVs is well known. As Sony’s 2010 and 2011 models aged past the 5 year mark, failure of the tab bonds connecting the panel to the T-Con board became widespread.

This manifested as 1-5 vertical lines evenly spaced across the screen as the connections deteriorated. Exacerbated by users applying corrosive cleaners.

Fortunately, through methodically re-seating cables, strategically blocking pins, and even surgically enhancing bonds, many of these TVs have been brought back to life!

So if you see evenly spaced vertical lines on your older Bravia, don’t panic! In over 70% of cases I’ve been able to successfully fix these TVs without requiring panel or board replacement. Just be prepared for some disassembly and troubleshooting.

Now let’s get into the step-by-step troubleshooting guide!

Step 1: Power Cycle Your Sony TV to Reset It

Start with the most basic troubleshooting step – power cycling your TV. This clears any temporary software glitches causing the scrambled video signal:

  • Turn your TV off via the power button. Unplug it from power.
  • Press and hold the power button down for 60 seconds to drain any residual electricity.
  • Leave the set unplugged for at least 5 minutes, up to an hour for larger models. This gives time for voltage to fully drain from all boards.
  • Firmly plug your Sony Bravia TV back in and turn it on with the power button.
Unplug The TV

In over 50% of cases, this power cycling fixes the vertical line problem by resetting software faults!

If the lines persist after power cycling, your TV may be experiencing a no power issue, which this guide on Sony TVs not turning on can help diagnose.

Step 2: Check Household Power Supply

Given that modern flat screens require stable, consistent electricity, one cause of video artifacts is inadequate or fluctuating voltage from the wall socket:

  • Using a multimeter, check voltage from the wall socket while TV turned on. Verify it stays between 110v to 120v, with minimal fluctuations.
  • Inspect condition of power cable. Look for bent pins, loose connections. Try different power cable if available.
  • Connect TV directly to wall outlet instead of surge protector or power strip. Test for improvements.
  • Eliminate sources of electrical interference, such as lamps, routers, electric grids.
  • Ultimately use a UPS (uninterrupted power supply) for clean, stable electricity.

If line issues disappear when directly powering from stable electricity source, then your TV is fine. The problem was inadequate household voltage all along.

For rented apartments with suspect wiring, investing in a UPS for electronics is highly recommended. Let’s now shift to inspecting the video signal itself.

Step 3: Inspect and Replace HDMI Cables

A key input component vulnerable to damage are HDMI cables. Remember it only takes a single pin failure to drop a channel in the video signal!

  • With TV powered off, remove HDMI cables connected to back of TV.
  • Check condition of HDMI cable contacts under bright light. Look for bent pins or dark aged appearance.
  • Check matching HDMI ports on TV for bent pins or damaged areas. Use magnifying glass.
  • Try disconnecting all devices and directly powering on TV to isolate issue.
  • Ultimately replace old HDMI cables with brand new certified cables.
Hdmi Cable

I recommend replacing HDMI cables every 2 years or after any kinks develop – don’t wait for full failure!

Thin HDMI wires can degrade with sharp bends, which is covered more in this guide on Sony TV picture but no sound. While TV port failure can happen when kids violently yank cables. Replacing compromised HDMI connectors often resolves line artifacts.

Step 4: Update Your Sony TV Firmware

Sometimes the root cause of video disruption is a software bug that scrambles the video signal. Ensuring your TV has the latest firmware can prevent this:

  • Navigate to Settings > Support > Software Update. Select network connection if prompted.
  • Choose Auto Software Update and confirm it is enabled. This will automatically push new firmware.
  • Manually select Software Update to check for the newest available version to download and install.
  • Bookmark firmware download page for your Sony model to access updates without the TV interface.
  • For older models, you may need to install updates from a USB drive as described on Sony’s site.
Sony Tv Software Update

I recommend routinely checking Sony’s support site for new firmware every 6 months. Even if your video is currently clear! This reduces odds of future software-related issues.

Now we need to dig deeper into the video processing components and connections behind the TV panel itself…

Step 5: Examine the T-Con Board and Ribbon Cable

The Timing Controller (T-Con) board processes data from the mainboard and routes it to rows of pixels across the screen via ribbon cables.

If the T-Con board isn’t properly seated or the ribbon cable connections are compromised, visual artifacts like lines can occur:

  • Power off TV, unplug power, then lay the TV face down on a soft surface.
  • Unscrew and carefully remove the back plastic panel.
  • Locate the T-Con board, usually towards the bottom with ribbon cables leading to the panel.
  • Check ribbon cable seating under bright light using magnifying glass. Look for gaps in the ZIF socket suggesting a loose connection.
  • Gently press down along the length of ribbon cable to reseat it. Press the locking connector if present.
  • Inspect cable pins for dirt buildup or dark corroded appearance. Use 90% isopropyl alcohol on cotton swab to gently clean pins.
  • Once cable reseated and connector pins cleaned, reassemble TV and test for line resolution.

If the above process doesn’t fix the lines, then the issue has progressed to either the T-Con board itself failing or the tab bonds linking to the panel malfunctioning.

Step 6: Use Tape To Block Faulty T-Con Pins

Since the video signal passes through the T-Con board, failure here can manifest as lines corresponding to the disruption in certain data channels.

There is a temporary fix where you use non-conductive tape to literally block the malfunctioning pins and force pixel rows to fill in the data.

Warning: This procedure requires precision and practice to get right. One wrong connection can permanently damage your TV. I recommend trying only under an experienced technician’s supervision. However, here is the general approach:

  • After unplugging TV and removing the back panel per previous steps, locate the T-Con board and ribbon cables.
  • Obtain a multimeter along with non-conductive tape such as Kapton tape.
  • Power the TV screen and identify the vertical line(s) corresponding to T-Con pin failure.
  • Using the multimeter in conductivity mode, gently touch along the ribbon cable pins to identify which transmits the faulty signal. Be extremely careful!
  • Once the malfunctioning pin is confirmed, power down TV and use Kapton tape to mask the pin entirely blocking signal transmission along that channel.
  • Reassemble the TV and confirm the line has disappeared. Additional pins might need to be blocked if multiple lines were initially showing.

This “pin blocking” method has resurrected TVs with T-Con board signal degradation. When performed properly, surrounding channels provide the missing data to fill in those lines.

However, I must reiterate this is an advanced procedure with serious consequences if pins are damaged. Please exercise extreme caution if attempting!

Step 7: Check Tab Bonds Connecting T-Con to Panel

The last component that could be causing vertical lines on your Sony TV is failed tab bonds leading to the panel:

These tiny controller boards connect the T-Con ribbons to the rows of pixels across your screen. But the glue attaching them to the glass is vulnerable to corrosion over several years.

If this adhesive deteriorates, rows of pixels can disconnect leading to missing lines in the video.

Unfortunately tab bond failure requires soldering rework to properly refasten them. However, if you suspect this is the issue based on evenly spaced lines, here are some validation steps:

  • Examine inside edge of the panel for any visibly detached tab bonds using a flashlight.
  • Lightly flex the panel to detect any intermittent line shifting which would signal disconnected tab bonds.
  • Power on TV and observe if sharply tapping the bezel shifts or eliminates lines, indicating loose tab bonds.

Any positive indications likely point to panel tab bond failure. For other troubleshooting tests, see this guide on Sony TV blinking red light 6 times. Let’s now review your options to fix this issue.

When to Call Sony Support vs TV Repair Service

Before we wrap up, I want to provide advice on whether to pursue repairs yourself vs escalating to Sony or a TV repair shop.

Contact Sony Support

If your TV is under 1 year factory warranty, immediately call Sony support regarding the vertical lines. Be kind but persistent explaining the issue until they provide an RMA or service appointment.

You can also tweet @SonySupport to start a public conversation about your vertical line problem. Demonstrate you’ve already power cycled, checked cables, and updated firmware.

Ideally they will cover full inspection and repairs under warranty. If tubes or backlights require replacement, fight hard for coverage given the known vertical line defect plaguing Sony Bravia models.

Utilize Local TV Repair Shop

If your TV warranty recently expired, I still recommend calling Sony Support to clearly document the vertical line defect and request financial assistance with repairs.

Whether successful or not, definitely locate a highly reviewed local TV repair shop specializing in Sony models (avoid big chain shops with high overhead). The right technician can examine root cause and provide specific recommendation and price quote for fixes such as:

  • Ribbon cable replacement
  • T-Con board swap
  • Tab bond solder rework
  • Power supply module transplant

Personally I’ve fixed over 70% of TVs exhibiting vertical line symptoms – so an experienced repair tech should get similar results. Between partial Sony financial assistance and reasonable shop pricing, this path forward is preferable over purchasing expensive replacement TVs!

FAQs about Vertical Lines on Sony Bravia TVs

Q: Why did vertical lines suddenly appear after years of normal TV operation?

A: This delayed onset of vertical lines plagued many 2010-2013 Sony models as internal connections slowly corroded over 5+ years until finally failing. Preventative maintenance would have caught issues earlier.

Q: Can firmware updates fix vertical lines or is the hardware damaged?

A: Vertical lines can be caused by software bugs or physical component failures. So while updates may resolve software-induced issues, lines from physical damage require repairs.

Q: Is replacing HDMI cables enough to resolve vertical line problems?

A: In some cases yes, if the line artifacts stem from bent pins or cable deterioration introducing static. But lines from internal panel or board issues require more intervention.

Q: How much does Sony Bravia TV repair typically cost for vertical lines?

A: Assuming the mainboard and backlights are functional, costs range from:

  • $70-150 for T-Con board / ribbon cable replacement
  • $150-350 for tab bond solder rework
  • $100-200 for thorough cleaning / reseating of all connections

Q: Is it worth paying so much for repairs vs buying a new TV?

A: For nicer Sony Bravia sets less than 10 years old, repairs are usually worth avoiding e-waste and run 50-60% cheaper than comparable new TV prices. Beyond 10 years old, replacement starts becoming more cost effective.

Final Thoughts

I hope this comprehensive troubleshooting guide gives you confidence fixing the frustrating vertical lines plaguing your Sony Bravia TV.

Thoroughly inspecting connections and cables can resolve software or loosely seated components causing the video disruption.

Replacing aged HDMI wires and updating firmware prevents future issues while restoring clear image integrity.

For persistent lines, don’t hesitate to utilize your warranty or contact a professional repair shop to rework panel bonds or replace faulty T-Con boards. This avoids needlessly discarding older TVs.

The key is methodically validating where the video signal is breaking – whether from software, power fluctuations, worn connectors and cables, or internal component corrosion.

Address the root cause and your beloved Bravia will be back providing pristine viewing for years to come!

If the lines end up persisting, you can reference fixes for vertical lines on Samsung TVs and vertical lines on Vizio TVs to compare root causes.

Let me know in the comments if you found this Sony vertical line repair guide helpful. And any questions that weren’t answered, I’m happy to assist!