Wondering if it's possible to remove the LCD screen without damaging it.

I noticed there are six black metal thingys at the back of the module that is twisted up holding the LCD in-place, is it safe to untwist and remove it? What do I have to know before doing so? I assume that is how the ant got in there the first place.

enter image description here

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    \$\begingroup\$ Known as de-bugging... :) \$\endgroup\$
    – Solar Mike
    Jun 28 '18 at 12:04
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    \$\begingroup\$ Some people teardown LCD screens to remove the backlight and use them as retroprojectors or transparent screens mods for computer cases side panels. So I guess it's possible. See displayblocks.org/fundamental-building-blocks/…. But I think this is off-topic here, it's a kind of repair question and not electronic design. \$\endgroup\$
    – dim
    Jun 28 '18 at 12:41
  • \$\begingroup\$ I would try spraying some compressed air first before taking it apart. \$\endgroup\$
    – Justin
    Jun 28 '18 at 13:16
  • \$\begingroup\$ I would not have expected to find a critter inside the LCD unit itself. I would first have tried to find out if there was protective plastic over the LCD that was part of the case, it might not require disassembly of the metal clips on the LCD unit. \$\endgroup\$
    – KalleMP
    Jun 28 '18 at 18:34

The black metal bezel around the LCD glass is what connects to those bent fingers. The bent fingers either capture the LCD circuit board in place from its edges or the fingers extend through slots in the LCD circuit board.

You can carefully bend the finger tabs straight and this will permit removal of the bezel. Once free the LCD glass will be able to be lifted away from the circuit board. You will see that it was sitting on zebra strip connectors that connect pads on the LCD circuit board to conductive surfaces along the edges of the LCD glass. Between the zebra strips and under the LCD glass you will find the back light unit if your display is one with backlight.

Use care to not get the zebra strip dirty and avoid getting finger oils in it as much as possible. When you reassemble note that the bezel piece is designed to provide some downward pressure on the LCD glass to enable good contact of the zebra strip to the glass and underlying circuit board.

enter image description here

Picture sourced from: www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjGlu2QxPbbAhUOCnwKHRV4BAQQjxx6BAgBEAI&url=http%3A%2F%2Fwww.vatronix.com%2Fservices%2Fnotes-info-61.html&psig=AOvVaw3uOCKs92MiCM3sJZofjsmo&ust=1530281270685787 for attribution purposes. Note that my antivirus software alerted to a malware at that site so use link with caution. Actual picture is copy from Google image view summary.

When you re-assemble the unit if there are any LCD pixels that fail to display it will be an indication that the some debris got stuck on the surfaces of the zebra strip.

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    \$\begingroup\$ I usually do not complain about down votes but some busybody with nothing better to do has downvoted here for no good reason. \$\endgroup\$ Jun 28 '18 at 13:07
  • \$\begingroup\$ Thanks, just what I need to know. I was able to easily pull out the frame, I did not bother to detach the lcd glass from the zebra strips though, worried that I might not be able to put it back properly. Saw the little bugger just below the lcd glass, so all is good now :) \$\endgroup\$ Jun 28 '18 at 13:41
  • \$\begingroup\$ @SamGibson - I hesitated to give a web site link. When I tried going there from the Google images display page my Anti Virus software indicated that the target web site was contaminated and unsafe. \$\endgroup\$ Jun 28 '18 at 13:52
  • \$\begingroup\$ It's pretty easy to hit downvote accidentally on an iPad while scrolling. Unless you've attracted a serial downvoting stalker (in which case the SE algorithms usually deal with it automatically) it's nothing to worry about. \$\endgroup\$ Jun 28 '18 at 14:12
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    \$\begingroup\$ @pipe - I didn't feel that this was a bad question. Useful design information on how LCDs are constructed is imparted and can be used by other folks who just learned about zebra strips. A downvote is certainly justified if an answer is outright wrong. \$\endgroup\$ Jun 28 '18 at 14:37

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