Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

DIY LCD Monitor backlight repair

DIY LCD Monitor backlight repair

LCD Monitors have become very popular with prices coming down, and screen sized growing. Those of us that have used LCD monitors for a while know that over time the backlight starts to dim and will eventually completely fail. Well for less than $20.00 and about a half hour of your time you can replace the backlight and rejuvenate that monitor to as good as new condition.

Overview
I have been using LCD monitors for years now, and unfortunately I have had the backlights in a couple of them fail. One failed due to the bulb, the second failed due to the power supply failing and hosing the bulb. I attempted to contact the manufacturers several times to try to get replacement parts, but the drones that work at Viewsonic or KDS gave me a canned response. “The model you have has been replaced with a newer model and is not supported any more”. almost every other month Viewsonic comes out with a new model that is faster refresh, or higher contrast ratio or something of the like…. so it has been totally imposable to get replacement parts. Couple that with the usual one year backlight warranty and you can see it can be good business for them to have a part that costs less them less than a dollar fail just after the warranty runs out. Well realizing that I am not the only one that has felt this frustration I decided to take matters into my own hands. I was surprised how easy and cheep it was to rescue my LCD monitors from the geek hacking bench. 

The Monitor
So first off you will need your monitor. Most LCD monitors are constructed the same way, with a cold cathode bulb as the back light source. A plastic sheet acts as a lens that refracts the light from the edge to the front of the screen and through the LCD panel. A small 12V inverter provides power to the bulb. As the bulbs get old they can have a hard time starting, lighting at all, flickering, or even putting out a strong pink colored light 

The Replacemt Backlight
Cold cathode bulbs can be hard to come by new and unused, and they can cost allot ordered from resale vendors. So we looked to case lighting for the source of our bulbs. Xoxide has an excellent selection of them with the inverter for about $9.00 and a couple bucks for shipping, and so does lcdparts.com. A good 15″ kit will provide a bulb for a 15″ monitor just fine! I have been able to find 17″ kits as well as 19″ kits. But most likely you wont have to replace your inverter, and that will save you a couple bucks. 

Tools that we used ( I.E. you may want to use as well ) 
One note on power tools: use them at your own risk. Be sure to read and understand any and all documentation on the tools you use. No amount of documentation can make up for experience, but there are many people with serious eye injuries at the school of hard knocks. If you don’t know what you are doing, don’t do it and find some one that can help.

Visit Here for more.







 

More Articles to Read

Scalar Network Analyser Jr
Scalar Network Analyser Jr
An Arduino-controlled automated whiskey distillery
An Arduino-controlled automated whiskey distillery
The Rex800 looks like a dinosaur Terminator
The Rex800 looks like a dinosaur Terminator
Home Environment Monitor
Home Environment Monitor
Understanding the Operation of the Frequency Synthesizer in Maxim’s RF Transceivers
Understanding the Operation of the Frequency Synthesizer in Maxim’s RF Transceivers
App note: EPIC: Electro-Pyrotechnic Initiator Chip Resistor
App note: EPIC: Electro-Pyrotechnic Initiator Chip Resistor
App note: Noise analysis for high-speed op amps
App note: Noise analysis for high-speed op amps
Skill Sunday: Arrays
Skill Sunday: Arrays
App note: Infrared remote control implementation with MSP430FR4xx
App note: Infrared remote control implementation with MSP430FR4xx
Gesture Controlled Smart Home
Gesture Controlled Smart Home
Design for a Wideband, Differential Transimpedance DAC Output
Design for a Wideband, Differential Transimpedance DAC Output
Wrist thrusters let you fly through the water effortlessly
Wrist thrusters let you fly through the water effortlessly
Bertan/Spellman 225-20R HV power supply teardown
Bertan/Spellman 225-20R HV power supply teardown
Blinking Christmas Lights
Blinking Christmas Lights
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adding an “extra sense” with rangefinders
Adding an “extra sense” with rangefinders
This wireless game controller looks like a rug
This wireless game controller looks like a rug
How to run your ESP8266 for years on a battery
How to run your ESP8266 for years on a battery
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Making beats on a tiny Arduino DJ controller
Making beats on a tiny Arduino DJ controller

Top


Shares