LCD not working after glass replacement?

Hi All,

Found this post the other night searching for the answer to this problem I had with my phone, after replacing the whole screen assembly. Sent the first one back to where I bought it and received a replacement with a similar problem.

Symptoms when the phone wasn't totally assembled (just the motherboard attached the the screen chassis frame and all the connectors and a battery inserted) are the phone would boot fine, then when any pressure was applied to the top half of the screen, the screen would go black and not return, but it would be responsive to touch input and the stylus.

I imagine due to having to apply pressure when fitting the back case, after fitting the case and putting in all the screws, the screen would not work at all. I tried the screen off the motherboard (but still in the steel mid frame) and it still had he same issue.

After much swearing and frustration, and emails exchanged between myself and the supplier of the screen - I managed to fix the problem.

The 3.5mm Jack is held in two small phillips head screws, one inside the case, and one that goes through the back case and through.

I removed the first of these two screws (the one that is only accessible when the case if apart), and reassembled the phone without any screw in this hole.

This has fixed my black screen problem. not sure if this will work for anybody else or if this is even the same problem, but I thought I would tell of my findings.

I had this exact same issue when I first got the phone a year ago, though not as bad. The screen would just go black while in use and then it would take a few lock/unlocks and maybe a battery pull to bring it back to life, but it eventually went away.

One thing I did notice was that the screws holding in the 3.5mm jack were -very- loose. Not sure if this is why the issue went away, but you never know

If this fix also works for anybody who tries it. Please us know of your findings!

Same exact thing happened to me! I thought the glue was under the glass too but that's just a plastic piece attached to the glass and it too needs to come off. So you run your guitar pick UNDER that plastic piece attached to the glass. Then u just clean the glass & glue off of the digitizer. Being very careful not to put a lot of pressure on it.

I finished the job but now I am having issues with digitizer. I may have to take it to another shop and let them fix it right. Then at least I have some recourse. This is a harder fix than it appears!

I've personally replaced about 30 screens. I've had one break on am LCD that was not attached to the mid-frame properly (the sticker covering the adhesive was not even removed!) Therefore when I applied the slightest amount of pressure the whole LCD shattered! I almost think the phone is a knock-off. The second one I've had issue with is the Note 2 currently in my possession. The backlight (LCD) won't show a picture, but the touchscreen is working as well as the home button and menu/back buttons. I think I'll try the fix stated above regarding loosening the screws surrounding the headphone jack. If that doesn't work, I'll try the front facing camera/led/sensor as I noticed that the screw took an unusual amount of torque to reattach. And if worse comes to worse I'll remove the glass, clean the lcd, inspect the cables, the top portion of the lcd where the digitizer, lcd and backlight attach. I really hate making customers wait, but at the same time I have them all sign a waiver that states, "replacing/repairing the glass on today's devices takes a high amount of skill. There is some danger involved which includes rendering your screen useless..." Two out of 30+ isn't bad considering the different breaks that I receive. I've refined my process, purchased a screen removal machine, and insisted that repairs take place on my time. Being rushed causes so many issues, including over application of the glue or missing steps (like forgetting to replace the home button).

I replaced my glass screen today.after putting back together the touch does not work. Color is.good, sound and calls work, just not picking up and touch. Any ideas of the problem??

The problem I have found with S5, is that after extraction and re-seat of the lcd, the IC on the LCD digitizer will short. The only way to fix this is to reflow the IC. Not sure if its a plan to fail part of the S5, or just a defect. Lots of customers have reported the "snow" effect occurring on their S5 LCD without ever having a screen replaced, so my thoughts are that they have a weakness in manufacturing that allows the solder joints of the smd IC component to be easily disturbed.

Reflow of this part is an extremely difficult process as it requires temps that can damage LCD if the heat is allowed to overflow onto the nearby LCD ribbon area (!Burn Spots!). Recommend that these units are professionally repaired; even with professional glass only replacement this damage is likely to occur, so dont be shocked if it happens to yours. Almost all units that come in with sturdy cases, such as otterbox tend to not have this issue, so its my opinion that the underlying damage to IC is pre-existing and most likely drop/shock related. Extraction only exacerbates the problem and forces it to become visible.

That's most likely internal crack of LED.

After a seemingly successful glass repair on my S3 I now have pink lines running across the screen at times. When I pull down the app drawer all the font is pink. It responds to touch but then when I try to text a message the response is extremely latent. I am now limited in the apps I can use with these issues What happened? I used a blow dryer and ifixit spudger to remove broken glass. Frustration

always check the connection of the cable after having to replace a screen for yourself

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galaxy s4 galaxy s5

I have recently had the same problem. I believe some extra glue had bonded the screen to the glass. I had an issue trying to remove 2 areas and that's where I found 2 slivers of the lcd screen.

Njcummings - chances are that you broke the backlight layer of the lcd assembly. So.... You will have to replace more than just the glass (which is the outermost layer of the Screen assembly).

just attempted my first glass change! i was told to leave it and buy a new lcd with glass, im pleased to say i found it very easy to do, all you have to do is take your time and not rush? i had a hot plate and heat gun but found it easier with just the heat gun..i used the hot plate when finished to heat the glue so as to seal it better..im now putting an add in my local paper to repair other peoples..

It's also worth mentioning that 3rd party screens can not handle the heat/process as well as genuine screens. Also, if the digitizer has been removed in the past.

Use a proper repair method do the full screen assembly. Glass replacement = fail.

I used dental floss to help pull the glass off the lcd without hurting it.

I have a galaxy S3 (att). My problem is I used my phone it was fine then the last thing I remember was putting it in m back pocket when I got home I plugged it up because when I used it last it was almost dead...so I plugged it up went back later and my phone u could here it come on the home screen and what knot lit up but there is nothing on my screen well now when u hit the lock button u can see the top partial of my back ground then it just goes black!! My front screen there is NO cracks nothing its in perfect condition!!! That's what is throwing me off!!! Anyone tell me what I can do to fix this or any insight of what I could do to fix it or what parts do I need to buy and if I have to buy any part please direct me to a good place to purchase them TIA :) HAVE A GOOD DAY

I've just done a charger port replacement on my galaxy s5, have put everything back together, but now have no screen...LED lights come on, but no picture. I have checked i connected it back up properly and can't see anything wrong..! Does anyone know what could have happened? Many thanks.