Hacked Gadgets Forum

January 5, 2008

LCD Display Repair using LEDs

at 5:12 am. Filed under Computer Hacks, Electronic Hacks

Bob Davis shares his technique to repair laptop LCD display using some white LEDs. Bob has lots of interesting hacks documented and has some cool videos on Youtube.

“You first need to remove the screen from the laptop computer. Then you need to remove the metal trim at the bottom of the screen, assuming that is where the light is located. Some screens have connections to the screen that go around the backlight and make in nearly impossible to remove the light. Once the light is removed the LED’s can be glued in with a clear glue. You might want to solder the LED’s together in groups of 3 for 9 volts or 4 for 12 volts first. I used 1/2 inch spacing between the LED’s for more even lighting. Once the LED’s were glued in and working I used alumimum tape like what is used on furnaces to make a 1/2 inch strip to go on the display to cover the LED’s and to replace the metal strip I had removed. Be very carefull as the tape and the cover are conductive and will easily short out the LED’s. I used electrical tape to insulate the cover and my connections.”


 

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9 Responses to “LCD Display Repair using LEDs”

  1. BigD145 Says:

    I like these mods, but the site is down. I have one laptop that is dim and needs something like this done to it.

  2. Alan Parekh Says:

    Looks like the site is up now. It’s Geocities so it may go down now and then from traffic.

  3. mrmeval Says:

    I’d suggest using a current regulator for those.

  4. pointlessd Says:

    Site is down. any page on geocities will die with more than 10 page views 🙁 This mod is right up my alley, as i have a lcd dismantled on my workbench for a similar idea. In particular, I wanted to know what type of LEDs he was using, specifically color temp ect… I have a whole bunch of LEDs that appear too ‘blue’ for this purpose.

  5. Conky Says:

    This is what I need to do. Is there any info on how to connect the led’s to usb power supply with the required resistance etc. A more detailed post maybe? Thanks

  6. Alan Parekh Says:

    check out the site linked to in the article. 🙂

  7. rahul Says:

    here is pictorial instructions for LCD removal.
    http://www.blisscomputers.net/servlet/the-template/bc_removalswf/Page

  8. Monitor Repair - Replace Dead Backlight with LEDs - Hacked Gadgets - DIY Tech Blog Says:

    […] have featured a monitor repair that Bob Davis has provided in the past. He has come up with a new design that may help some of you […]

  9. bartman2589 Says:

    I don’t know if it shows once it’s fully reassembled but that ‘flare’ produced by the LED’s across the bottom of the screen would be a definite turn-off in terms of getting me to do this type of mod/repair, now if he had possibly molded the LED’s into a clear resin bar using a resin casting kit and then painted it with a very thin translucent white coating to help diffuse the light so that it’s more like the light being cast by the fluorescent tube that’s being replaced then the end results might be a little better looking I think. And yes I know this is a bit of a ‘necropost’ but the comments I made above are still relevant regardless of when the original article was written.

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