Troubleshooting Help

Repairing your TV can be challenging. Diagnosing it correctly is key. Not sure where to begin?  We are a full Service TV and Electronics repair facility, with years of experience repairing electronics.  Please check the information below to help you get started on your repair journey.

Get to Know Your TV Parts

What is a Main Board?

The simplest way to identify the Main Board is to look for the circuit board with the audio and video inputs and outputs such as HDMI. Sometimes the Mainboard is called as Motherboard, Main Unit, Digital board, Scaler board, A/V board, or even A/D board. The function is to take in the video and audio signals and convert the video signals into digital signals that can be sent by the LVDS IC (low voltage differential signaling) to the T-con board. The main board houses the operating system for your TV. Software is stored on small components and is responsible for controlling nearly all functions of the TV. 

 

Common faults– No remote response, hdmi ports not working,  TV stuck in boot up/ load phase, no sound, Standby led light is on but TV will not turn on. TV turns on but no backlight. The last one is most commonly bad backlights but could also be a mainboard issue. Wifi and LAN internet not working. 

What is a Power Supply?

The power supply is most easily identified because it has a slot for the power cord to plug into.  It contains transformers, capacitors, and integrated circuits. The power supply board will connect to the mainboard with a cable. It is responsible for converting the 120v of power it receives from the power outlet to the correct DC voltage that the TV needs to run. While the TV is off the power supply will provide standby voltage, typically 3v or 5v. The power supply is also responsible for supplying the correct voltage to the led backlights so you can see the picture on the screen.  

 

Common faults– No power, TV is dead, no standby light on TV, no response from remote. When you attempt to turn the TV on you hear a clicking sound but TV does not turn on, TV is power cycling constantly.  

 

What is a T-Con Board?

The timing control board, known as the  T-CON board, is typically only found on LCD and LED TVs. Plasma TVs, on the other hand, use a logic board. The functions of the logic and T-CON board are similar: each function to digitize the information it receives from the TV’s processor. This allows the screen to display images on the pixel level. When the T-CON or logic board fails, the screen images may become distorted, leading to pixilation and the appearance of lines on a television. On a logic board, there are slotted connectors on all four sides, while T-CON boards have connectors on just two sides.

Common faults– White Display, No display, Double image, Display distortion (black and white vertical bars on the screen). Multiple vertical/horizontal lines across the screen.

What are Backlights?

The function of backlights (CCFL or EEFL) is to illuminate the LCD from the back of the display panel.

 

Common faults-Display shutdown after few seconds and display flickering

 

What are Buffer Boards?

Buffer boards are also only found in plasma screen TVs. Connected to the Y-sustain board, a buffer board works to turn output to the plasma display. Common defects of buffer boards include the burning and shorting of power lines.

 

Common faults- Vertical lines on the panel or a blacked out vertical portion of the screen.

What are Sustain Boards?

Also known as the X-SUS and the Y-SUS, the x-sustain and Y-sustain boards only appear in plasma screen TVs. The X-sustain board may also be called the Z-SUS. These boards function similarly, producing proper screen images. Although they serve pretty much the same function, the two boards work independently of each other. The X-sustain board activates all the display lines at once, while the Y-sustain board addresses all the individual lines of display. When one board breaks down, it probably does not affect the functionality of the other. However, it may be a good idea to have both replaced because X-SUS and Y-SUS boards have a relatively short lifespan anyway. A failure of one could mean an impending failure of the other.

 

Common faults-Negative image, flashing pixels, dark image, has sound but no image, vertical colored lines on screen.

 

 

What is a Inverter Board?

Found on LCD TVs,  inverter boards are used to mount the LCD backlight. These are smaller boards, usually shaped like long, thin rods. If an LCD TV’s screen is dark, distorted, or difficult to see, it can be the result of a defective inverter board. Inverter boards fail when inadequate power is not allowing current to pass through the backlight bulb.

 

Common faults- Display shutdown after few seconds, Dim display

What is a LED Driver?

Responsible for supplying the DC voltage needed to illuminate the LED’s behind the screen. Serves the same purpose as a backlight inverter just works differently. It takes a 12V or 24V DC from the power supply and amplifies it to a high voltage direct current in order to drive the power for the LED’s.

 

Common faults– No illumination of the screen, screen lights up then goes off, no picture but has sound.

 

Troubleshooting faq

How can we find the model of our TV?

Finding your TV model number can sometimes be difficult if you’re not familiar where to look. Don’t worry, we have this handled for you. If you need to locate your model number and do not have the user manual or sales receipt, it is typically found on the back or side of the television depending on the brand.

 

TV Model numbers are usually a series of numbers and letters found on the manufactures sticker on the back of the television.  Here you can also usually find the TV’s serial number. Each manufacturer’s label will be different. If you have difficulty locating the model number on the TV, Depending on the brand, the number can be found in the support or help menu setting.  This illustration should assist with helping find the number in the most popular brands.

 

What if I'm not sure which part I need?

When searching for the correct replacement part it is very important to find the part number on your original circuit board or part that needs to be replaced. Do not search by TV model number only as many TV’s may use multiple variations of a circuit board or part for the same TV.

You can always contact us and we can point you in the correct direction. Again, we are always here to help!

physical damage to screen

Your TV comes with some sort of manufacturers warranty. Typically 1 year. You can find the warranty information in the owners manual or the manufacturers’ website. Unfortunately, this does not cover physical damage to the panel (screen). If your television has physical damage such as a broken screen or water damage, it is not worth repairing. This is different from any aftermarket warranty purchased at the time of sale through the seller. If you have elected for the additional coverage, contact the servicing company to check physical damage coverage.

 

We often receive calls for replacement screens. TV manufacturers do not make replacement screen available to the general public. There are some authorized retailers of panels (screen) out there. However, the cost of replacement a screen is far worth more than the purchase of a new TV in itself. Unfortunately, we do not carry any replacement panels.

Can you repair my tv for me?

 

Of course. We are a full service electronics repair center repairing LED / LCD / Plasma / DLP TVs, game consoles, DVD players, projectors, CD players, blue ray players, receivers, speakers, subwoofers, radios, stereos, speaker docking stations, computer power supplies, amps, mixers, microphones, audio interface equipment, surround sound, sound bars, fans,  heaters, wine coolers, anything audio/video related.

Have an oddball item not listed? Call us, we will be happy to let you know if it is something we think we can fix. We repair circuit boards of all kinds at the component level. We work on power supplies out of almost anything. We also solder loose and broken connectors out of a wide variety of items.