LCD Hack – How to Fix Broken Backlights with Lightbulb and Old CRT Monitor Case!



Broken LCD?  You might want to check out if your LCD is really broken of if it’s just its backlight.   If its just a backlight problem, you should try reviving it using a lightbulb and an old CRT monitor case as this DIY shows you how.  I think this could come in very handy for sheezy.

Fix any broken LCD backlight with an ordinary light bulb and a dead CRT monitor. Broken LCD monitors basically come in three categories: 1) Cracked LCD panel, rendering the unit completely worthless 2) Backlight problem 3) Power supply problem If it’s a backlight or power supply problem, it can be fixed. Usually, the problem stems from the high voltage inverter circuitry, either bad power transistors, capacitors, or thermal stress on the circuit board leading to broken solder joints. But fixing these problems can often be a short term solution. The bulbs themselves have a limited lifespan, and the high voltage power supplies are prone to failure. The panels themselves almost always outlive the backlights and high voltage power supplies. The 17″ Dell LCD monitor I found was no exception. When I first plugged it in, it would cycle power on and off continuously, with a notable burning smell. Further inspection revealed a fried power transistor. When i replaced it, the monitor stayed on, but the backlight would flicker on and off, then finally shut off after a few seconds.. The panel was good, but trying to fix the backlight with the proper parts wasn’t really worth it. But maybe I could still save it, or even make it better. After all, it’s just a light. Lights should be user-replaceable things anyway. I mean, a Lite-Brite was the cheapest toy, yet you could at least change the bulb. So here’s the result of my experiment, with help from an old CRT monitor:

via instructables

2 Responses to LCD Hack – How to Fix Broken Backlights with Lightbulb and Old CRT Monitor Case!

  1. r4i software says:

    This LCD is very nice .In LCD we can see picture in very high resolution and in it we enjoy digital result of the picture.In LCD picture look very original and very clear which attract all of us.The sound quality of this LCD very clear.I will plan to buy this kind of LCD for my personal use.Thank you for this post.please keep posting like this with this useful information.

  2. Lassar says:

    A fix for crt lcd’s.

    I like it. Very smartly done.

    Does the light display evenly on the screen ?

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