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A (very) Simple LCD Backlight Fix

Step 4Results

Results
See my project page for more pictures.
http://www.ccs.neu.edu/home/bchafy/monitor/crtlcd.html

Conclusion

This LCD was saved from the trash.
And now if the light ever goes out, it's easy to change. Also, as a bonus, the monitor vents glow, partly illuminating the desk and keyboard at night. Shouldn't all monitors be made this way?
:-)

Notes

LCD Monitor is a Dell E172FP.

When the monitor is off and the light is on, the display is more transparent than black, sort of a light/mid gray.

There is some minor hot-spotting, but not very serious. Given the type of cheap hack this is, it is more than acceptable.

Obviously, the monitor is more bulky than it used to be, but very light. Almost half the weight of LCD monitor as it was before.
Bathroom scale says it weighs 7lbs. (original LCD weight was 13.25lbs)
Gettting rid of the LCD's metal frame, stand, and heavy plexiglass light filter was the major contributor to the weight reduction.
The CRT's shell and base are just plastic (with some springs).

The LCD frame was smaller than the CRT's. I just cut out some cardboard to fill in the gaps to block out the light for now. I know, it looks ugly. Later, I'll make a better looking frame.

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10 comments
Oct 7, 2010. 1:35 PMgana_anaq2 says:
Great idea ! For a better illumination try to use fluorescent bulbs ( the old ones like tubes) and in front of them put a laminating foil unheated. This is a mate surface and it will make the light to distribute uniformly. The led solution is not good because the led is omnidirectional, and you will see the spot where the led is.
For an estetic look try try to put 12mm fluorescent bulbs ( like in emergency light {EXIT} ) inside the original case, and the inverter for that lamps put it with wire in a separatly box :)
Sep 12, 2010. 1:57 AMh3x_your_nightmare says:
put a mirror inside the crt-case ;) oh...and use an AC variator for the bulb ;) if you wanna change the luminosity ;)
Jun 4, 2010. 6:33 AMnessim says:
very nice : )
Apr 8, 2010. 3:06 PManimal0307 says:
Use an LED light bulb. With cut down on the heat some, be more efficient and brighter.
Feb 11, 2010. 9:10 PMtherockof2004 says:
 Very Nice.

Jan 19, 2010. 5:12 AMenderak says:
new lcd screen is lightning spread :) use silicone  or same 
Nov 8, 2009. 7:00 AMbill2009 says:
that's great - thanks for the idea and how-to.
Aug 17, 2009. 8:57 PMtinnyjl says:
THIS WILL BE A GREAT TO SAVE SOME MONEY
Aug 8, 2009. 4:10 AMdjupblue says:
Just a tip, cover the inside of the crt-case with aluminim foil. That will give you much more light!
Jun 25, 2009. 1:20 PMkiwimac says:
Great idea and a simple way to fix a transistor problem.

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Author:bchafy