A faulty T-Con board can cause serious picture problems on a TV even when the television powers on normally and produces sound. If your TV has a black screen, half screen picture, vertical or horizontal lines, distorted images, flickering, colour problems or a picture that appears washed out, the T-Con board could be one of the components responsible.

At Refitec Kenya, we diagnose and repair TV T-Con board problems for different TV brands and models in Nairobi. Before replacing a T-Con board, proper testing is important because similar symptoms can also be caused by the screen panel, mainboard, power supply or LVDS connections.

This guide explains TV T-Con board symptoms, testing procedures, common faults, repair options and estimated T-Con board replacement costs in Nairobi.

What Is a TV T-Con Board?

The T-Con, or Timing Controller board, is an electronic board responsible for processing and controlling the video signals sent from the TV’s mainboard to the display panel.

It helps control how images are displayed on the screen, including:

Picture timing
Pixel data
Horizontal and vertical image information
Colour signals
Communication between the mainboard and display panel

The T-Con board is found in many LED, LCD, QLED and other flat-screen TVs, although its design varies depending on the manufacturer and model.

A T-Con fault does not necessarily mean that the TV screen itself is damaged.

Common Symptoms of a Faulty T-Con Board

Knowing the symptoms can help determine whether your TV needs T-Con board testing.

1. TV Has Sound but No Picture

The TV may turn on normally and produce sound, but the screen remains black or extremely dark.

However, this symptom can also be caused by faulty LED backlights, the power supply, mainboard or screen panel. Proper diagnosis is therefore necessary.

2. Half of the Screen Has a Picture

One of the more noticeable T-Con-related symptoms is when one side of the screen displays an image while the other side is blank, distorted or a different colour.

This can sometimes indicate a T-Con, panel or panel-driver problem.

3. Vertical Lines on the Screen

The TV may develop:

Vertical coloured lines
Black vertical lines
Multiple lines
Lines covering part of the display

T-Con faults can cause these symptoms, although damaged panel connections can produce similar results.

4. Horizontal Lines

Horizontal lines, missing sections of the picture or unusual patterns can also occur when video data is not being correctly processed or transferred to the panel.

5. Distorted or Double Picture

A faulty T-Con board can result in a picture that looks:

Distorted
Doubled
Pixelated
Split
Unstable

6. Wrong or Abnormal Colours

A TV may display unusual colours such as excessive green, blue, red or pink. The picture may also appear washed out or have incorrect colour reproduction.

7. Flickering Picture

If the picture repeatedly flickers, disappears and returns, or becomes unstable, the T-Con circuit or its connections may require testing.

8. White or Grey Screen

A TV displaying a completely white, grey or washed-out screen may have a T-Con-related fault, although the panel and other circuits must also be checked.

What Causes T-Con Board Problems?

Several problems can cause T-Con board failure.

Common causes include:

Power surges
Electrical fluctuations
Overheating
Failed capacitors or electronic components
Shorted components
Damaged ribbon cables
Loose connections
Corrosion
Faulty voltage regulators
Damage during previous repairs
Age-related component failure

Power fluctuations are particularly important because sensitive TV electronics can be damaged by unstable electricity.

How Is a TV T-Con Board Tested?

A professional technician should not replace the T-Con board based only on the appearance of the picture.

At Refitec, diagnosis may involve checking several sections of the television.

Step 1: Visual Inspection

The technician examines the T-Con board and surrounding connections for signs of:

Burn marks
Damaged components
Corrosion
Physical damage
Loose ribbon cables

Step 2: Check the Power Supply to the T-Con

The T-Con requires specific voltage supplies to operate correctly. A technician checks whether the required voltages are reaching the board.

If the T-Con is not receiving the correct voltage, replacing the board may not solve the problem.

Step 3: Check LVDS and Ribbon Connections

The connection between the mainboard, T-Con and display panel is checked.

Loose, damaged or contaminated ribbon connections can cause symptoms that look like a defective T-Con board.

Step 4: Measure T-Con Voltages

Technicians can test important T-Con voltage lines and circuits to identify abnormal readings.

Depending on the TV design, this may include checking different panel supply and signal-related voltages.

Step 5: Test the Mainboard and Panel

The mainboard and screen panel may also need to be tested because they can produce symptoms similar to T-Con failure.

This is why professional TV diagnosis is important before buying a replacement T-Con board.

Can a T-Con Board Be Repaired?

Yes. Some T-Con boards can be repaired instead of completely replaced.

The repair depends on the specific fault.

Possible repairs include:

Replacing faulty capacitors
Replacing damaged regulators
Repairing damaged components
Correcting power-supply faults
Repairing certain board-level faults
Cleaning or restoring connections
Repairing damaged solder joints

However, not every T-Con board is economically repairable. If the board has severe damage or a critical integrated circuit has failed, replacement may be the better option.

T-Con Board Repair vs Replacement

The best solution depends on the diagnosis.

T-Con board repair may be preferable when the fault is limited to replaceable components and the board is otherwise in good condition.

T-Con board replacement may be recommended when the board has extensive damage or a suitable replacement is available at a reasonable price.

A technician should also confirm that the replacement board has the correct part number and is compatible with the TV panel.

TV T-Con Board Replacement Cost in Nairobi

The cost of TV T-Con board repair or replacement in Nairobi depends heavily on the TV brand, screen size, model and availability of the board.

Typical estimates can fall within the following ranges:

Service	Estimated Cost in Nairobi
TV diagnosis	KSh 1,000
T-Con board minor repair	KSh 2,000 – 5,000
T-Con board major repair	KSh 4,000 – 8,000+
Standard T-Con replacement	KSh 3,500 – 8,000
Large/Premium TV T-Con replacement	KSh 7,000 – 15,000+

These are estimated prices, not fixed quotations. The actual cost can only be confirmed after checking the TV model, T-Con board part number and fault.

Premium and larger TVs may require more expensive boards.

T-Con Board Replacement for Different TV Brands

Refitec provides diagnosis and repair support for various TV brands, including:

Samsung TV
LG TV
Sony Bravia
Hisense TV
TCL TV
Panasonic TV
Skyworth TV
Vitron TV
Vision Plus TV
Synix TV
Eefa TV
Mooka TV
Tornado TV
Xiaomi TV
ITEL TV

The exact T-Con board differs from one model to another. Therefore, the TV model number and board part number should be checked before sourcing a replacement.

Can a Bad T-Con Board Damage the TV Screen?

A T-Con fault does not automatically mean the LCD or LED panel is damaged.

However, certain faults involving incorrect voltages or panel circuits can cause serious display problems. This is why continued operation of a television with severe picture abnormalities should be avoided until the fault is diagnosed.

It is also important not to replace expensive components based purely on symptoms.

How to Know If the Problem Is T-Con or the TV Screen

This is one of the most important questions customers ask.

A T-Con fault can produce symptoms such as a distorted picture, missing sections, abnormal colours and lines. However, a damaged screen panel or panel-driver circuit can produce almost identical symptoms.

A technician needs to test:

Mainboard output
T-Con power supply
T-Con voltages
LVDS connection
Ribbon cables
Panel connections
Panel-driver circuits

If the panel itself is defective, replacing the T-Con board may not restore the TV.

Should You Buy a T-Con Board Before Diagnosis?

It is generally better to test the TV first.

Different TV models can use different T-Con boards, and even TVs with the same screen size can have completely different boards.

Before purchasing a replacement, check:

TV brand
TV model number
T-Con board number
Panel number
Board revision
Connector arrangement

At Refitec, technicians can help determine whether your T-Con board needs repair or replacement before you spend money on the wrong part.

TV T-Con Board Repair Services in Nairobi

If your TV has sound but no picture, vertical lines, horizontal lines, half-screen display, flickering, abnormal colours, a white screen or distorted images, professional diagnosis can help identify the actual fault.

Refitec Kenya provides TV T-Con board repair, testing and replacement services in Nairobi and surrounding areas.

We work on different TV brands and models and can also diagnose related faults involving the TV motherboard, power supply, backlight, T-Con board and display panel.

A proper diagnosis can prevent unnecessary replacement of expensive TV parts.

Frequently Asked Questions

How much does T-Con board repair cost in Nairobi?

Minor T-Con repairs may cost around KSh 2,000–5,000, while more complicated repairs or replacement can cost considerably more depending on the TV model and board.

Can a T-Con board be repaired?

Yes. Some T-Con faults can be repaired at component level. However, replacement may be recommended where the board is severely damaged.

Does a faulty T-Con mean the screen is damaged?

No. T-Con faults and screen faults can produce similar symptoms. Testing is required to determine which component is responsible.

How long does T-Con board replacement take?

If the correct replacement board is available, replacement can often be completed relatively quickly. Diagnosis and availability of the correct part can affect the total turnaround time.

Can I replace the T-Con board myself?

T-Con boards contain delicate connections and are connected directly to the display panel. Incorrect handling can damage sensitive components or ribbon connections. Professional installation is recommended.

Get TV T-Con Board Repair in Nairobi

If your TV has a black screen, sound but no picture, half-screen display, lines, flickering, abnormal colours or a distorted picture, contact Refitec Kenya for professional TV diagnosis, T-Con board repair and replacement.

We repair TVs in Nairobi and handle Samsung, LG, Sony, Hisense, TCL, Panasonic, Skyworth, Vitron, Vision Plus, Synix and other TV brands.

Refitec Kenya – TV T-Con Board Repair & Replacement in Nairobi

Website: refitec.co.ke

Diagnosis fee: KSh 1,000.