Greetings fellow note enthusiasts. I have a N910T that I'm trying to replace the glass/ digitizer on and currently not successful. I bought a used unit off ebay that was previously on a N910F. The glass digital was still on the N910F frame so I just swapped everything from my own unit over in hopes it would work. In my mind the only difference between part compatability would lay in the modem chip set for the cellular band communication. However I'm not looking sure where those are located. Long story short, after assembly the phone doesn't boot up. It was functional last time it was put away and now it's not. Am I going to have to separate the glass/ digi from the N910F frame and over to mine? I thought the problem could lie in the secondary board at the bottom of the phone that has the micro USB and nav buttons.
Related
After my AT&T Samsung Galaxy S4 screen cracked I figured that buying a new screen on eBay was the best course of action to take to fix the phone. While browsing for the best screen I came across a cheap listing of a Samsung Galaxy S4 already assembled screen (apparently the unit was DOA but the screen worked). Naively I thought buying this listing would be most convienent: all I had to do was switch out the internals and I would have a working phone and screen without having to take out the hairdryer.
It turns out, however, that I mistakenly bought the SGH-I720 model. There are several differences between the I720 model and the I1337 model. The external loud speaker from AT&T, for example, does not fit the I720 model. The digitizer touch component (located to the left of the battery) is constructed differently. The back casing (the plastic mold covering the internals) will not fit on the I720 model because of this digitzer component. Oh, and apparently I do not get any GSM service from my AT&T carrier.
The rest of the phone works perfectly though. Wifi, bluetooth, the camera -- etc. Everything else that was transfered over with the main motherboard works.
I suspect it's an antenna issue. Obviously, right? I do get some service though! I just have limited GSM connectivity. Is this because of a carrier lock? The key difference between the I720 and the I1337 is the bottom part of the phones (underneath the loud speaker). It appears that the I720 model has two antennas whereas my I1337 phone only has one. I'm assuming the I720 is capable of GSM connectivity (it says so on the product page) and therefore believe that the GSM antenna (on the right of the battery) should work. I also believe that it is properly working. Why else would I have signal (albeit weaker than I'd typically expect -- but that could be because I haven't fully constructed the phone and the case isn't on etc, etc.
So my question is: does anyone know how the carrier lock works? Does Sprint have it hardwired in the phone or is it purely software? If it is a software thing than I shouldn't have an issue -- I do, after all, have an AT&T phone in a Sprint body. Does anyone here with better technical expertise know why the bottom half of an I720 phone is simply incompatible with a motherboard from I1337? For testing purposes I connected the antenna from the motherboard in the I720 to the bottom half of the broken I1337 phone. I still get service but again -- limited connectivity and emergency calls only.
Any help? I'm thinking I should just cut my losses and buy a new screen and just manually replace the screen on the I1337 but I'm sitting on a working front end to a I720 and I really really want to make this work.
EDIT: I realize that it's L720 and not I720. Oops.
But here's an update: I moved back the motherboard from the L720 to the I1337 (where it came from originally). I just plugged in the screen from the L720 so that I could see what was going on (the I1337 screen is flat out broken). TURNS OUT that I don't get service period from the I1337 model! Which hopefully means that a) I'm not connecting something right or b) it's a really simple software issue that you guys know how to fix?
I did try calling 911 and I did hear a voice on the other side very briefly. I immediately hung up. So I have a feeling that my phone is connected to a network but isn't being properly recognized. Is there an emergency number that I could call to test my phone (that's obviously not 911)? I just want to hear a reocrded message or something that gives me a set of instructions...
You cannot use the L720 for any network other than Sprint in the USA. You have to call Sprint to unlock it internationally and then enter a gsm sim while out of the country and only then can you use it. There are several threads that explain all of this already. Just a suggestion but don't call 911 and hang up.
Sent from my Sprint Galaxy S4 using Tapatalk 2
Dude, I'm confused... You have an L720 logic board inside of an I337 body or is it the other way around?
Sorry for the confusion. I have the logicboard of an I1337 (AT&T) inside of the body of L720 (Sprint). The only Sprint components of the phone are the body, the LCD / digitizer, and the small electronic board found towards the bottom of the device (one end of the antenna is connected here . . . the other end on the logic board). See my attachment to get an idea of what I'm talking about when I say "bottom of the device."
Regarding using the L720 in the US with other networks: I understand that the L720 is locked to the Sprint network. However, I have an AT&T (I1337) logic board. Where does the lock come into play? If the lock is software based... it shouldn't be an issue. If the lock is hardware based but isolated on the logic board... it shouldn't be an issue.
same issue
Any luck resolving this issue?
I have ab s4 i9505 laying around with broken screen and as i don't need it as phone I have an crazy idea to pickup an 7" display (thinking about tab 3) as they are pretty cheap and attach it to phone for use as an in car head unit. I am wondering if someone did anything similar or have any idea if this will work. I have no idea if connectors are same even, there could be other problems also but I would like to build this Frankenstein
I own a tab 3 and my son owns the 9505.
Both need screen replacements, so it is safe to say I have researched both screens.
The S4 has a sealed unit, single part lcd panel and digitizer that requires a single connection to the motherboard.
The tab 3 has separate lcd panel and digitizer, both of which need to be connected to the motherboard via their own dedicated flex cables. So (catagorically) yes, the connectors are different, and no, there is absolutely no cross compatibility. Even if they were the same, I have a feeling that DPI would be an issue.
The S4 has a better/higher resolution screen than the Tab 3, so a hypothetical 'swap out' of screens would (even if it was possible) cause widespread system instability at best......
I have gotten ahold of a Huawei P8 GRA-TL00 & i would like to replace the LCD (Screen), Frame, Rear Cover. To a) Change color from White to Black and b) Restore the device back to a like new condition.
My issue is that this will be my first time getting hands on and repairing the device myself. Im stumped with the question of do i need to have a specific GRA Model LCD + Frame to install or will any 5.2" GRA-??? LCD Screen + Frame work with the GRA-TL00 internals?
Thanks in advance!
** Ive Since Learned that the GRA-L09 Model is Single Sim and my Model is a dual Sim so i know the Midframe from that model will not work. Now just to find out if a GRA-L09/UL00/CL10 etc.. LCD will atleast work or would it still need to be TL00 only? **
I just got my screen replaced for the GRA L09
its a LCD, battery, component, frame piece, all combined with ribbon cables. Its a single sealed unit, and is model specific.
I didnt think to keep it, and photograph it.. I left it at the repair shop for them to recycle.
Heya guys, to make a long story short, bought an S8 on ebay, Verizon G950U, and was told the camera didnt work and there was no IMEI etc...
Upon checking, the front camera has a torn connector. I fiddled around with the daughter board where the antenna connectors etc.. are, (breaking the speaker and its entire cover in the process) and sometimes I randomly get cellular back, but it doesnt stay for long. i'm not sure whats faulty, but I'm certain it has nothing to do with the mainboard. The latest time the connection popped back was when I tried moving the back cover back on, I guess something must have clicked. I already reinforced the wires and the surrounding connectors, but I cannot get cellular at will. Would replacing the board in it's entirety be a fool proof solution? Hoping for help on the matter.
EDIT: Not sure if it was coincedental, but Also during one of the times the cellular service returned, it was immediately when I plugged my headphones into the device.
Akumai said:
Heya guys, to make a long story short, bought an S8 on ebay, Verizon G950U, and was told the camera didnt work and there was no IMEI etc...
Upon checking, the front camera has a torn connector. I fiddled around with the daughter board where the antenna connectors etc.. are, (breaking the speaker and its entire cover in the process) and sometimes I randomly get cellular back, but it doesnt stay for long. i'm not sure whats faulty, but I'm certain it has nothing to do with the mainboard. The latest time the connection popped back was when I tried moving the back cover back on, I guess something must have clicked. I already reinforced the wires and the surrounding connectors, but I cannot get cellular at will. Would replacing the board in it's entirety be a fool proof solution? Hoping for help on the matter.
EDIT: Not sure if it was coincedental, but Also during one of the times the cellular service returned, it was immediately when I plugged my headphones into the device.
Click to expand...
Click to collapse
I had a note 5 that cellular issues because the quik plugs for the antennas wore out and it did a similar type thing Once I swapped mbs it worked like a dream
I have a screen assembly for a SM-N900, and I've already been forced to accept a return for the thing by paypal once from someone who didn't read my listing at all and bought it to try and fit in a N9005.
I'm wary of re-listing it as it is, because it seems even going into detail about exactly what happens when you try to put a N9005 board in it is not enough to stop paypal from finding it as "not as described".
sorry for the irrelevant rant, but I'm still annoyed about it.
anyway, I'm thinking that I will wait until I find a suitable parts not working phone with a smashed screen and create one fully working phone which I can sell, and I'm wondering if anybody knows if any boards other than the SM-N900 will fit in the metal frame of this assembly.
I know the screen works fine with other models, as I've tested it with a N9005 motherboard, all the connectors work the same, and it responds to touch and stylus input normally. the problem is that the metal chassis that the screen is attached to is cut to a slightly different shape, so when you put a N9005 board in it, you can't screw the phone back together properly.