LCD Monitor Backlight Replacement - Cost to Replace LCD Monitor Backlight

The thin CCFL backlight tube costs $5 to buy, while the super-bright backlight costs $20

When I repair LCD monitors, I usually install the 7" Citizen CTZ179 backlight or the Stanley CBS4-160S backlight. Both are $5 retail and last around 3-5 years without dimming.

Additionally, if your LCD unit (monitor or television) is for outdoor use, check out the Sharp backlight (Sharp BL-C053)

LCD Backlight Replacement - How To Test If The Backlight Lamp Is Working

When you are installing a new replacement backlight bulb in your laptop's LCD screen, it is important to confirm that it is actually working.
 

There are 2 ways to do so:

1. Connect the replacement bulb to the inverter board and turn on the laptop. The bulb should turn on.
2. If it doesn't, then connect the video cable to the LCD screen before turning on the laptop. This should light up the backlight bulb.

LCD Backlight Repair - Tips On When To Repair LCD Monitor Backlight

The backlight is one of those parts of a LCD monitor that becomes dim over time, causing the screen to lose its brightness.

Most LCD monitors use a cold cathode fluorescent lamp (CCFL tube) as the backlight source, powered by an inverter. When these bulbs become old, they start flickering and can sometimes turn the screen pink.

Rather than replace the monitor when this happens, simply replace the backlight for about $9 (the approximate cost of a case lighting kit).

Go for a 15", 17" or 19" kit (or higher) based on your monitor size. Often, you won't need to change the inverter, so that can save you some money there as well.

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LCD Monitor Repair - Backlight Repair Tools & Techniques

LCD Backlight & Inverter – Connection Between the Backlight Tube & Power Board Inverter

• Backlight is a small cold cathode fluorescent lamp (CCFL) that's roughly 1/10th the size of a regular tubelight. It lights up the LCD screen from behind and can be found in everything from cell phones to monitors, laptops and digital watches.

• Inverter is the electronic power board that supplies electricity to the backlight. It has its own set of circuits & components that are part of the SMPS board.

Some of the most common problems that affect a LCD monitor can be pin-pointed to the backlight, inverter or capacitor. When your LCD monitor goes dark, the reason is usually a backlight bulb which needs to be replaced.

Understanding how electronic components function helps in locating the exact problem faster and with more accuracy.

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LCD Monitor Repair – Understand Electronic Components & Repair Techniques

CCFL Backlight Tube Used in a Laptop LCD Screen

Like most light-emitting electronic gadgets, LCD laptop screens too are powered by a thin fluorescent tube called the Backlight.

In most cases, it’s a CCFL tube (cold cathode fluorescent lamp) that emits a bright white light under a high frequency input. This in turn lights up your laptop screen from behind.

Within the laptop case, the CCFL tube is paired with an inverter to complete the backlight effect.

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LCD Monitor Repair – Updated Tools, Techniques & Electronic Manuals