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I own a computer repair shop and have alot of experience working on mac’s and pc’s. I recently started offering phone and tablet repair services. I dont really have any issues with any other device. But I have worked on 3 difference Ipod touch 4th gen devices and every time I install a new digitizer the top left hand corner starts to seperate from the casing, its like the adhesive isnt strong enough to hold it there, Ive read forum after forum. I remove the old digitizer, re-install everything test fit the digitizer, clean the digitizer frame with alcohol. apply the adhesive according to the guide. Then press the screen into the frame. then the top left hand corner separates every time. I have disassembled the devices and checked to make sure everything is in place, but there is either something out of place pushing the digitizer’s back up or I am continually getting defective 3m tape. Is there a better adhesive I should be getting? I’m assuming this is something small and stupid I have simply overlooked. Any help would be greatly appreciated.
When you put the screen on hold the ipod with the top to your left and long ways. Take the glass and tilt it up from the bottom about 15 degrees. Push the top in first and work your way gently down to the bottom. You should feel the screen “snap” in place. When your first starting out, do this several times, without the adhesive on, to get the right feel. At this point you can check the iPod, if there are any issues, you can easily remove the screen, fix the problem, and re-check. Once everything runs ok, lay down your adhesive and insert the screen as described.
I have replaced LCD/Digitizer assemblies on 4th gen iPod Touch’s over 300 times in the past two years and it took a while to get it down to a science. If the glass was not shattered too badly to begin with, I use heat to carefully remove the glass and preserve the original adhesive, clean with alcohol and toothbrush when you are done picking out the shards, and be sure to keep track of which screws go in which positions. Install new screen and reassemble. If I do the above method and still have that top left corner raising on its own, I disassemble the iPod and remove any extra thickness wherever I can. Remove the foam/adhesive from beneath the WiFi antenna (it’s still sticky after ^^)Remove the bushing under the top screw of the volume keysRemove the transparent 2-sided tape from beneath the metal plate that raises it off of the motherboard where the volume flex connects.Remove the black tape on the top of the volume flex screws.Ensure the metal casing is not dented on the back, and that the corners are not bent.If they are, bend them back.Last resort, blame the parts and super-glue it in place. I only replace the adhesive if the existing stuff is full of glass fragments and dirt.
Hi Robert, I have replaced several digitizer/LCD-units and sometimes, but not always, I had the same problem. I always check out if there is something stuck in the clamp holder of the metal clamp and if it really “snaps in”. But it seems, that in your case, everything is clean and works. I recently “switched” to super glue to avoid that metal clamp/bracket to get loose or to move, even slightly. It seems to me that the adhesive that I used was sometimes not strong enough to hold down the digitizer/LCD-unit permanently. With super glue, however, the problem seems to be solved. I would Just put a few dots on the back of the metal bracket and let it dry. But there is one disadvantage: Once you use super glue, the metal plate can not be removed again in case of a (later) replacement of the digitizer/LCD-unit. I hope I could help. Steffen
Are you cleaning any old adhesive and glass from the wifi cable and surrounding area? Also, after you fit the new screen, I always heat up the screen adhesive areas to soften it, then clamp down the screen so it can cool and create a strong bond. Are you transferring the metal bracket? I know its on the opposite side, but it seems to make the top area seal better. Hope that helps.
