yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] fix000:
problem

Hi guys, I think I have the same problem. I cracked the display on my Google Nexus 7 3G (32GB) ME370TG and bought a new screen on ebay. Unfortunately, after replacing the screen tablet doesn't work. It only shows a picture of full battery when I connect it to the charger. Do you think that it's the flex ribbon cable's fault? Thanks in advance
[Nexus 7 Q&A, Help & Troubleshooting] iTiS_EST:
If I well understand the problem with the battery or battery cables or battery cable connection. if you have a tester/Voltmeter/Multimeter,

check if the voltage supplied from the motherboard to come (when not connected to the charger).

The flex ribbon cable fault can do "no backlight" (and when using a flashlight can be seen the screen image).

Difficult/hard to understand your story:

"It only shows a picture" - what the image shows? (maybe you can take photos?)
[Nexus 7 Q&A, Help & Troubleshooting] bobbywolly:
If you are seeing just a picture of a battery when the charger is connected then your tablet is turned off. Try pressing and holding down the power button for a period of possibly one to two minutes and it may well start up.
[Nexus 7 Q&A, Help & Troubleshooting] bigbop:
If you see a picture of the white battery, your display is working fine but the tablet is off. Do a reset by holding the power button depressed until the tablet restarts.
[Nexus 7 Q&A, Help & Troubleshooting] fix000:
Thanks for the answers. I'll try to hold the power button and check the battery with the multimeter and let you know.
[Nexus 7 Q&A, Help & Troubleshooting] DemonHunter92:
if you can see that battery all you have to do is reset your N7. Just follow the instructions that you have from our forum mates. It should do the trick.

As far as my tablet goes - still no luck - now i have only a black screen with nothing - though i know the tablet powers on - but doesn't show anything. I know it powers on because I can hear the sound it makes when i plug it in for charging or unplug it.

Any other aces?
[Nexus 7 Q&A, Help & Troubleshooting] jbr05ki:
Shux I just split open my LCD trying to replace just the glass. This process kinda sucks lol. :laugh:

I think I need to return this and just get the whole sealed combo fusion fo dat ass.
[Nexus 7 Q&A, Help & Troubleshooting] Hutchism:
Hey all.

I'm a bit over halfway into this repair. I've managed to split the LCD from the digitiser, now I need to get all the glue off and order a replacement digitiser once I know the panel is ok.

Big tip for anyone doing this. -I've finally found out what hair straighteners are actually meant to be used for! :laugh:
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
If your tablet has a black screen it's due to the LCD (inner display) being broken or faulty. Do you have a cracked Digitizer (outer glass) as well? depending on your needs we have both the LCD and digitizer both sold separately and as a combination for easier repair, and include a repair video and tech support via "live chat" and more on our website. If you have any other questions we are happy to help! Have a great day!
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
We have what you need on our website and include a free repair guide as well as "live chat" tech support to help you if you get stuck. Check us out!!
[Nexus 7 Q&A, Help & Troubleshooting] Antoron:
This is what we need for gluing nexus 7 glass and lcd: double-sided OCA tape!

It's on Aliexpress, Product ID: 1392721303.

"OCA for NEXUS 7 optical clear adhesive double-side glue digitizer touch screen YL4134"

And the screen assembly made by ourselves would look like stock!
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Yes the full assembly (combo screen), is a much easier repair. We have the part available on our site (link in the signature) if you're interested.
[Nexus 7 Q&A, Help & Troubleshooting] KrilanPL:
Best is : Isopropyl alcohol together with razor blade and should be no problem to clean it very fast.
[Nexus 7 Q&A, Help & Troubleshooting] Danvid113:
So if I understand correctly, you don't need to have anything between the LCD and the digitizer?

I broke my digitizer after 3 weeks.. Incredible, but I'll try to repair it now (I've been using it with bluetooth mouse).

I only need to make sure that the LCD is fixed to the digitizer?

*update: I just found and LCD and TFT cleaner, that is without alcohol. Do you think that would do the job? (removing the adhesive)
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Like any repair its on a case by case base. The LCD you have should work for the job. Just have to check and make sure.

Good luck on your repair.
[Nexus 7 Q&A, Help & Troubleshooting] joelgrice:
Has anyone tried an OCA pad or LOCA to glue the digitizer to the lcd yet? I'm gathering materials now. I have everything to separate the two but trying to decide which route to go to put it all back together.
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Adhesive strips will work as well!
[Nexus 7 Q&A, Help & Troubleshooting] joelgrice:
Do you mean adhesive strips around the bezel only or between the digitizer and lcd?
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Here you go. You should have adhesive in the red boxes and please don`t judge my paint skills
[Nexus 7 Q&A, Help & Troubleshooting] joelgrice:
Thank you for the illustration. I have the adhesive strips to attach the digitizer to the silver bezel in the areas you've highlighted. What I'm wondering is which type of adhesive would be best to use between the digitizer and lcd, LOCA UV glue or an OCA pad like the one mentioned a few posts back. My understanding is that when using an OCA patch/pad/tape, an autoclave is needed to remove all of the air bubbles.
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
I used 2mm adhesive tape from 3m.

Check our website in my sig. and search for 5-0985
[Nexus 7 Q&A, Help & Troubleshooting] zichzach:
Screen

I've got an spontanious crack in my 1st gen Nexus 7 today. I'm now deciding either replacing it or to buy another tablet. One thing I want to take into consideration is the quality of a replacement display. Does anybody know if the displays sold on Ebay are of a similar quality as the original one?
[Nexus 7 Q&A, Help & Troubleshooting] peppial:
Please help

Dear all.. can you please help with following:

I got a new LCD, replaced as per instructions - now Touch screen is OK, I can click and hear beep. The display however stays black. Sometimes I can see in the very dark something on it (the hour for example). Most of the time I see nothing.

Can you suggest what I did wrong?

Many thanks!
[Nexus 7 Q&A, Help & Troubleshooting] joelgrice:
Not the ones made by chungwha. The colors aren't as good. They seem a little dull and blacks aren't as black, more of a dark gray. Try to get an original Hydis. If you can reuse your old silver bezel, you can get just the digitizer & lcd. If not, you'll have to get the whole assembly: digitizer, lcd & bezel.

I have a few assemblies with an intact digitizer, lcd & bezel all together & ready to slap in your tablet. It's really simple to put a new assembly in.

PM me if you're interested.
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Hello ,

Sounds like the cable is not connected correctly . Check your connections on the jawbone. Sounds like something did not connect.
[Nexus 7 Q&A, Help & Troubleshooting] 3XTR3M1ST:
Alright guys, my screen broke, and I've been reading lots of repair guides and feel confident about doing the replacement. But I do not get why is everyone talking about it being difficult to replace with a separate LCD or digitizer. I'll probably use a styrofoam cutter to peel the screen off. Then what's so hard about putting on the old LCD and new digitizer together? Is it really necessary to have them glued/bonded/whatever together at the screen area? Why not secure them with hot melt glue at the sides, say the perimeter of the LCD's back metal plate? I need answers, somebody please answer them. Thanks in advance!
[Nexus 7 Q&A, Help & Troubleshooting] 3XTR3M1ST:
anyone?
[Nexus 7 Q&A, Help & Troubleshooting] joelgrice:
Not sure about the Styrofoam cutter. How thick is the wire? It needs to be about 0.08-0.12 mm. It needs to be perfectly smooth so as to not scratch the lcd. Also you'll need to get it up to 80 degrees Celsius and keep it there to soften that glue. Then you'll need some OCA glue remover to clean the lcd.

The problem with hot melt glue is that it's thick and weak bonding glass. It will most likely create an air gap between the lcd and digitizer which can lead to dust getting in between and the digitizer will flex when you press on it. You'll probably be better off with some 3M adhesive tape around the perimeter of the bezel. I got mine on ebay for $5. Enough for dozens of replacements.

Not trying to discourage you. By all means, try and see. I haven't had time to experiment but I have tons of cracked screens to play with. I might not try it if I only had one personal nexus 7.

Let us know how it goes...
[Nexus 7 Q&A, Help & Troubleshooting] bigbop:
Don't use a Styrofoam cutter. The wire gets too hot and will damage the lcd. You need to watch the YouTube videos mentioned earlier in this thread and use the thinest, smoothest and strongest wire

You can get for this task.
[Nexus 7 Q&A, Help & Troubleshooting] 3XTR3M1ST:
the idea about using a styrofoam cutter (basically a machine with tensioned, heated wire) is because so that I wouldnt have to repeatedly heat the entire screen. the heat from the wire is localised and is only where it is working the cut the glue. Not sure about the thickness of the wire but I think it is replacable with a e guitar wire like everyone else is using.

Im thinking of putting the glue around the perimeter of the LCD's metal plate. Thats after I have the LCD smacked on top of the digitizer lying face down. That way I should get a get a proper perimeter seal. But since I have not take a screen apart myself, I dont know how it actually is. Is the screen shaped in such a way that there will always be a gap inbetween the LCD glass and digitizer glass?

which of these is true?

if there indeed is a gap, am i right to say that in the original assembly, they are using glue to fill up the entire empty space? If you're using tape around the perimeter, that wouldnt fill the gap and so the digitizer would still flex, right?

I wished I had tons of screens like you do and really love to experiment with, but I dont. So I'd like to get this right first before doing anything.
[Nexus 7 Q&A, Help & Troubleshooting] joelgrice:
The factory glue is pretty thick. If you attach the lcd to the digitizer without glue between, there may be a slight gap at the rear of the lcd where it rests on the midframe. I'm not sure if it would cause a problem or not. Maybe you could put a spacer between the rear of the lcd and the midframe.
[Nexus 7 Q&A, Help & Troubleshooting] 3XTR3M1ST:
This guy didn't even try to fix the LCD to the digitizer at all!

http://www.youtube.com/watch?v=m8Vneq7VD-U

Anyway, since you have plenty of screen lying around, do you have one that is totally bricked, so you can "damage" it in such a way that it reveals the internal layers (section view) of the LCD assembly, from front glass to back metal plate?
[Nexus 7 Q&A, Help & Troubleshooting] khil:
Thank you for this guides and posts.

I stand in front of very unlikely scenario. Namely, I stepped on my Nexus 7 2012. And surprise, surprise, the glass did not break. Not only that, the digitizer (touch) works perfectly :eek: !. That can't be said about the LCD though, which shows classic "I threw my wii remote into the TV" splash on it. Later I found that I also cracked the battery behind it and it leaked... but that's another problem, already dealt with.

So like a moron i purchased LCD replacement only, without researching on screen fixes. So i got LCD for around 25 bucks, working digitizer and intact glass, with broken LCD attached to it. I already purchased cheap used 16gb version and swapped mainboards (mine was 32gb 3G), out of sheer frustration. Now I slowly want to make this one work... well because I can and have all components to make it run again.

Question is: how much easier/harder is separating and cleaning the screen when you care about glass and not the LCD? sic.

Optionally if somebody here wants to buy unopened LCD i got from ebay I will maybe consider buying an assembled set digitizer+LCD
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
The Nexus 7 does have a a fused screen. To separate the fused screen will be a hard challenge as a novice tech. If I was you would just buy a new touch screen digitizer and then put your new LCD with your new Touch Screen. That would be the best thing to do here.
[Nexus 7 Q&A, Help & Troubleshooting] khil:
Well I got guitar string, aluminium plate, hair dryer and I read the whole thread. As I have a working Nexus anyway, the effect doesnt bother me much, and for example got no plans to glue the new LCD, just mount it in the bezel like on some videos. I was thinking, since I don't have to be careful about LCD, i could just rip it off without being gentle to it, and focus on protecting glass. How sensitive is digitizer anyway? Are the elements well fused in glass, or there is risk of scratching them when for example using razor on the inner side of glass to remove glue residue?
[Nexus 7 Q&A, Help & Troubleshooting] Fivetenfrank:
Friends

I am on my 2nd replacement screen. Replaced the first one no problem. Not having much luck with this one. The screen is blank. Dead. I know the device is on because my computer can see it. I have disconnected it, reconnected, etc

I am wondering if I fried the screen when I was connecting/ reconnecting - with the battery plugged in - which I probably did at one point, inadvertantly.

Is this DOA? Any way to resurrect a fried LCD?
[Nexus 7 Q&A, Help & Troubleshooting] tr4b33r:
I did my screen replacement lately but some errors occured after device was turned on.

1) brightness control is not working. I've checked sensor and it's responding very well. I cannot change brightness with settings as well as auto setting is not responding but it dims with no problem with 3rd aplications.

2) there are 2 stripes all over the screen. Strips changes colour.

3) device/screen is getting hot after few minutes of normal using (not gaming) in a place where GPU is located.

4) when rotating, I have coloured dots on the of the screen.

There are 2 possibilities - LCD is defective or GPU has some problem.

After I've replaced screen with digitizer and turned on a device, I realized that one of the digitizer ribbon cable (upper one) was not fully inserted - screen was not fully responding and the image was not clear.

Any ideas what to do? I can replace my device with another nexus 7 with cracked digitizer (but not burned GPU) or change LCD with digitizer for the new one.

K.
[Nexus 7 Q&A, Help & Troubleshooting] normal73:
Hello

I opened my nexus 7 and it was cracked.

http://imgur.com/a/XbZIL

Here is the album.

You can't see the crack when screen is off.

But when I turn it on, there are some cracks...

Touch-screen works but it doesn't give feedback.

What can I do?:confused:

Please help me...
[Nexus 7 Q&A, Help & Troubleshooting] donniegalaxy2:
Good one, I have some pieces laying around, you've inspired me to try it out.
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Hello Normal,

From your pictures you will need a new Touch Screen + LCD.

you can find the part from our website from my sig below.
[Nexus 7 Q&A, Help & Troubleshooting] normal73:
I have already sent it to technic service.

It has been 11 days, they haven't called me yet.

I'm waiting...
[Nexus 7 Q&A, Help & Troubleshooting] lowprize:
Today I get new lcd+digitizer from ebay, replace cracked one and turn on. But display is dead, so I try connect N7 to PC and n7 is browsable.

Is possible test LCD+digitizer. Or test GPU output. Thx
[Nexus 7 Q&A, Help & Troubleshooting] kidrobot52:
Very guys just got the n7 2013 my n7 OG has a cracked screen. Is anyone interested in buying it. You tell me a reasonable price and it's yours

I'll post pics if any body wants don't mean to high jack thread. Pm me if interested
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
So the LCD would be bad. I would recheck the connections as take it apart again and recheck all the connections. Could be just a lose cable.

If you have done this and everything is connected the way it should be then it is a bad LCD. I would suggest a new part from the place you have ordered it from.
[Nexus 7 Q&A, Help & Troubleshooting] Danvid113:
Do you need anything between the digitizer and the LCD?

It doesn't have any effect if it isn't glued together, right?

In that case I would just glue the edges to make sure it doesn't move, and next time I don't have to worry about separating them. I would only need to buy a new digitizer
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
Leaving it hollow in between the digitizer and the LCD can cause touch responsiveness to drastically drag, also with it hollow it is much easier to break the screen again.
[Nexus 7 Q&A, Help & Troubleshooting] d3890666:
48355523 5131

Hello. First of all sorry for my english(

I've changed my lcd with touch panel. But lcd doesn't work in OS (old one work now and before). New LCD works on fastboot and TWRP so do touch panel. What can do? I tried to reanimate tab with full stock fimware but that did not help me((

Can u help me?
[Nexus 7 Q&A, Help & Troubleshooting] d3890666:
It was light sensor... I think i've damaged it with replacement.
[Nexus 7 Q&A, Help & Troubleshooting] Stefoos:
hello! i have Nexus 7 32GB 3g (2012). I have just received my replacement screen (my old one broke) . I change the screen but when i try to turn on tablet i can see (if i look closely) the google logo but no backlights! do you know what cause it? i need the ribbon cable to connect the board with the screen? Which one? (why the old one doesn't fit?)
[Nexus 7 Q&A, Help & Troubleshooting] repairsuniverse:
If you attach your old screen will the backlight turn on? It sounds as if it could be a defective LCD.
[Nexus 7 Q&A, Help & Troubleshooting] Stefoos:
no! still no backlight! i remember when i removed the old screen for the first time (just to check how easy it is to change ) and put it back it worked ok. but after i tried the new one no. i don't have backlight even in the old one (sorry for my english, i'm still learning )
[Nexus 7 Q&A, Help & Troubleshooting] gruv2ths:
Hey guys,

This also happened to me, I am fixing broken digitizers on 2 2012 Nexus 7s. What I have found is that like mentioned above the flex ribbon cable that connects the LCD to the main board is very fragile. Both my flex ribbons crapped out. They both crapped out kind of differently. When one of my bad ribbons is installed i get 8 bit color, the other bad ribbon gives me nothing just a blank screen.

As i went through the process, removal of glass from bezel, removal of digitizer from LCD I kept testing to see if I had broken the LCD.

And I think all of the connecting/disconnecting/flexing makes the ribbon go bad.

The guy above did a GREAT job of taking pics of his bad ribbon cables and showing in great detail the defects. Well done dude!

I got a replacement ribbon cable from ebay and tried it in the LCD i just liberated from its cracked digitizer, and when i saw the crisp black and white GOOGLE at start-up I have to say I danced around in my garage!! LOL RELIEF! Up till then I thought that the 8bit video was due to me screwing up the LCD during tear down.

Anyway just my 0.02.
[Nexus 7 Q&A, Help & Troubleshooting] Meshuggah27:
HALP!

Just replaced the screen on my buddys 1st Gen Nexus 7 32GB. Digitizer was cracked and didnt work, but panel was fine and had a display. Now i got the new screen on there, no display just a backlight. It operates fine outside of it not giving a display. I can hear the gesture noises, and when i plug and unplug the USB cable to my computer. I put the old screen back on, and the same thing happens. Just no digitizer functionality (how it originally was). Any ideas?
[Nexus 7 Q&A, Help & Troubleshooting] deltatux:
When you said ribbon cable, do you mean the LCD cable or the digitizer cable? I'm having an issue where I can see the Google logo and can boot into fastboot but if it tries to go into recovery or normal boot-up, the screen just dies.

Does anyone know how to fix this?

Your help will be greatly appreciated.

Cheers,

deltatux
[Nexus 7 Q&A, Help & Troubleshooting] deltatux:
So I tried disassembling and reassembling to ensure that I got everything in, now the screen doesn't even light up, I shone a light on to the display, seems like the backlight isn't turning on and the screen is showing garble. I'm hazarding a guess that the LCD cable is dead? I'm quite sure that the digitizer isn't the cause for this right?

Please help.

Cheers,

deltatux
[Nexus 7 Q&A, Help & Troubleshooting] fuji_man:
Anyone could help?

I am trying to replace this 3g unit of mine.. I drop it on something hard.. it crack the digitizer. I took the digitizer off.. but after cleaning,, I realized the polarizer film is also was damaged.. Do anyone have a dead LCD I could have so I could pull that polarizer film off? (The black film that is on the LCD)
[Nexus 7 Q&A, Help & Troubleshooting] ohvzwguy:
Dead spot in digitizer

I've replaced the entire screen twice with new and even replace the logic board with the same effect. I have a half inch wide dead spot running the entire length of the screen on the right side. I feel this is being caused by some type of interference, but cannot locate the source. any help would be greatly appreciated.
[Nexus 7 Q&A, Help & Troubleshooting] gruv2ths:
So 2 LCDs and 2 motherboards and same problem?? The only thing left is the ribbon the connects LCD to the motherboard.

I have 2 Nexus 7s that I am working on, and both have bad LCD ribbons. <$10 shipped on Ebay.

Interesting thing, there is a guy on Ebay that is selling these ribbons and has sold like 100 of them.

If this one seller on Ebay has sold that many, then this is a real weak spot in this tablet.

---------- Post added at 02:05 PM ---------- Previous post was at 01:58 PM ----------

Hey guys, just removed the glue from my Nexus 7 LCD. I used this:

(they wont let me post the link, so go to lcdglue and click glue remover)

And scraped with plastic razor blades. The combination worked pretty well.

Also bought the cutting wire from them, but have yet to try it.

LCD still works, so I ordered the digitizer.

My next obsticle is to get it all back together with the digitizer accurately working.

---------- Post added at 02:31 PM ---------- Previous post was at 02:05 PM ----------

I meant the LCD ribbon that goes from the LCD to the motherboard, not the digitizer ribbon.
[Nexus 7 Q&A, Help & Troubleshooting] deltatux:
It could just be a faulty digitizer tbh...

deltatux
[Nexus 7 Q&A, Help & Troubleshooting] ohvzwguy:
2 different full screens from different suppliers both having the exact same issue on two logic boards?
[Nexus 7 Q&A, Help & Troubleshooting] gruv2ths:
Why would the digitizer mess up the video?

As it turns out, the digitizer is just a piece of plastic that senses pokes, it should not be able to display anything.

You can make the Nexus 7 boot with the digitizer disconnected. You just wont be able to do anything with it. But it will show the start up video. That way you can eliminate the digitizer as a suspect once and for all. Just unplug the battery to shut it back down after.