Hello, I own the SM935W8 variant of the S7 Edge, bought directly from Samsung in Canada. Recently, I needed to do a capacitor/charge port replacement due to a torn ribbon cable. This is the module:
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After restarting, I lost all LTE reception. I saw the LTE statusbar icon flicker a couple times with very low bars, then it disappeared, never to be seen again. It's been a couple weeks. It was working fine immediately before. I'm almost certain it's a hardware issue incurred upon disassembly/reassembly. My phone has been opened more than ten times, owing to screen and camera issues. Lots of little parts to remove, maybe something wore. I already tried reseating all the hardware. I'm going to buy replacement coaxial antennae cables, because I'm thinking I may have bent a pin in one of them. This is the part:
However, I have a variant where the antenna doesn't go like that. Instead of 3 cables (right side, red/white/blueish), I have only two (left side, blue/white, partially obscured by bottom black piece). Note the lack of third, uppermost coaxial cable. Not a lot of documentation on these differences. The cables come for sale in either groups of 2 or 3.
In case replacing these cables doesn't work, what could the problem be? Does anyone know of any hardware part that, if broken, would cause loss of 4G signal specifically?
How about this part? Some websites simply call these pieces "motherboard cover", but other websites call it "antenna":
See here for website referring to these three pieces as "antennae". They do contain some pseudocircuitry that looks like it could contribute to cell reception. Since they're not super expensive, and I had problems making them fit back together 100% immediately before I lost the signal, I wonder if I should just replace them all too?
The only other thing of note is that I stripped one of the 15+ screw holes battening down the 3 black cover/"antenna" pieces that go over the hardware, hence I'm operating without one screw. The only feasible way this could contribute to the problem is if a certain amount of tension is required to keep some metal contacts together. It seems unlikely, but that's another reason to replace the black pieces.
I really don't think it's software related, although I haven't yet tried a factory reset or different ROM, kernel, or modem. I did try to see if it has anything to do with the APN settings, but sadly it didn't. I wonder what else it could be? Thanks for any guidance.
Related
The Wifi of my HD2 is all of the sudden barely working. It only gets a signal if it's about an inch away from a router, so in practice it's not really working.
I tried several roms and radios, run task 29, but nothing has had any effect.
Do you have any ideas what has happened? Do you think it is hardware-related?
Have you checked in the WIFI settings,there is an option for best performance or best battery.
Yeah, it doesn't seem to change anything.
maybe uve bent the phone and the antennas/antennas solder pad disconnected
Interesting.. I have been pushing the sides of the (somewhat recently replaced) digitizer pretty hard in an attempt to make it fit perfectly, because the service-people apparently didn't do so. Could this have loosened or disconnected something?
Another possibility is of course that the service-people did something, but they claim that's not possible.
Anyone?
(yea, this is a bump of sorts)
WiFi signal extremely weak
I have the same problem with my HD2. I tried changing ROM and/or Radio but nothing happens. This is not my first HD2, i buy them and then sell them here in my country so it is probably a hardware issue. However this is the first HD2 i got that is apparently manufactured after June of this year, which I think is a new model.
Here is a comparison between the HD2 and a Pure, side by side in the same room. (The router is about 3 meters from the devices)
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Any other one with a problem like this?
yeah, my HD2 has always got weak WiFi signals, while my laptop shows 4 bars, the HD2 only shows 2 bars. But back then, the WiFi is still usable.
but since last week, I kept getting disconnected from the WiFi router when i try to access the internet. No matter how many different ROMs and Radio i try, they are all the same.
I'm starting to wonder if HTC hardware fails after a certain period of usage... hmm...
Phone was prolly damaged during the repair process, take it back and have them replace it
My HD2 appears to have some big time screen problems, so i wonder if anyone has any sugestions.
Background
It never really lived in a case and the inevitable drops happened. That ended in about November when one drop too many caused the screen to crack. I replaced the digitiser and lcd screen which got it all working again happily, though beecause of the amount of fiddly stuff involved the chassis never truly fit perfectly, the screen protruded ever so slightly above the edge of the case, etc.
Fast forward to last weekend when for no apparent reason (i hadnt dropped it or anything) it started to behave erratically, not registering screen taps and then suddenly doing many things at one, making it almost impossible to send text messages and use effectively. My thought was that maybe it was losing calibration so tried aligning the screen but nothing would really happen.
Furhtermore it seemed like the bottom section of the screen had almost no responsiveness at all.
I therefore thought it might have something to do with the connections inside the machine, so i decided to take it all apart and check all the connections were sturdy. Thats when the real problems started because when i put it back together and turned it on, i had a horrible display that makes it next to useless.
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I actually just fired it up to check that it was sill the case and it seems slightly worse than this picture!
So the questions. Firstly, does anyone know what might be the problem here. Is it likely to be the connection between the processor and the lcd, or soemthing more of a problem? How easy is it likely to be to sort it? A case of a completely new screen needed? Or is it likely to be something fairly simple? And would those problems with teh LCD screen be a similar cause of the calibration problems (i thought the digitiser might not be working properly, hence the original decision to take it to pieces!)
Hope someone can help. Happily my upgrade was due last friday, buit it would be nice to have a working phone for spare use etc.
Steve
It seems to me a bad LCD(100%) and probably a bad touchscreen!
As i suspected. Has anyone else with a replacement digitiser/lcd had any similar problems?
Hello,
i have an unlocked Samsung galaxy S4 and I keep getting a no service stop sign (see screenshots) at the top of my device. I cannot make calls nor receive any sms messages. However I can connect and use a 4G network.
Things I tried to solve this:
Use other simcards
Switch network operator
Factory reset
Flash Cyanogenmod
airplane mode on off/restart phone
Send my device to samsung for a repair
None of these things helped me out and I really am stuck here, none of my friends who also have a galaxy S4 and are on the same network have these problems and even the Samsung technicians didn't solve it. please see the screenshots below with my network status.
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Other screenshots
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Status 2
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Is there anything else i can do to solve this?
Thanks in advance!
Did the Samsung techs explain what they did? I'm assuming they restored the device to stock and weren't able to resolve this. Since you've done virtually everything software related and the problem hasn't been resolved, you need to look at the hardware.
Yes, I was thinking that too... But what hardware problem could this be? The antenna? Are there any guides on what I should do/check?
There aren't any guides I'm aware of. The two easiest fixes on the S4 are the antenna wire and the SIM card tray. I'm more inclined to believe your SIM card tray is the culprit here, as you are getting 4G signals that you wouldn't get if your antenna was bad. You have tried different SIM cards and had the same result, so we can rule out the SIM itself as the problem. I'd replace the SIM card tray. Replacements are inexpensive at about $10USD off Amazon and replacing the tray is about the easiest thing one can do on the S4.
When you do the replacement, the new tray likely will not have the rubber pad on top of the motherboard connector that the original has. Simply peel the rubber pad off the old tray and put it on top of the new tray's connector. This ensures the connector doesn't loosen during use.
I'm wondering if anyone can identify the two components circled in red in the lower right corner of this image?
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I recently replaced the screen on my Nexus 6P, but these two component came loose (likely from when I took off the screen connector below them). One of them was lost as well.
After replacing the screen everything seems to work ok except that the Sim card is not detected. (The same sim works in other phones.) I'm suspecting that these two components are the issue. It's pretty likely that I would not be able to successfully replace them, but then again it might be worth trying.
Any thoughts? Thanks!
Your image link don't work..
But btw, why did you replace it? Broken?
I hear it's a very difficult and risky process to replace screens on 6P..
Sent from my Nexus 6P using Tapatalk
I just updated the image in the original post. I think it should show up now.
I dropped the phone from about two feet up and the touch screen quit working. Replacing the screen was a bit daunting, but actually seemed to go quite well until I figured out the sim was not recognized any more. It was a bit tough to pry off the camera shield on the back and to pry the insides from the body the first time. But now I can do it without too much trouble.
I think that the two parts I wan to identify might have been a bit damaged before (water damage?), and then I might have inadvertently helped them along.
balesse said:
I'm wondering if anyone can identify the two components circled in red in the lower right corner of this image?
I recently replaced the screen on my Nexus 6P, but these two component came loose (likely from when I took off the screen connector below them). One of them was lost as well.
After replacing the screen everything seems to work ok except that the Sim card is not detected. (The same sim works in other phones.) I'm suspecting that these two components are the issue. It's pretty likely that I would not be able to successfully replace them, but then again it might be worth trying.
Any thoughts? Thanks!
Click to expand...
Click to collapse
I can't see your image for some reason either on Tapatalk but I can in web view. Check ifixit for a full outlook of internal parts:
https://www.ifixit.com/Teardown/Nexus+6P+Teardown/51660
Edit: On second thought, the piece you're asking about wouldn't be discussed by them.
Sent from my Nexus 5X using Tapatalk
That's gonna be tough with no markings on the board or components. Google "identify smd components" might yield some helpful results. I think they are either smd resistors or fuses. As a last resort bridge the connections individually with solder or conductive glue. Check with multimeter after you bridge them to insure no resistance (good connection). Really looks more like those are components for the display circuit though.
normally those are some resistor smd.
you can check on other phones (service manuals) what kind of component is there.
i saw a service manual for lg g3 here on xda, you can check whatever you want but try to search for a component like that.
Sprint LS997, refurb bought Oct 2017 via Amazon, non-rooted, Android 8.0.0 for a few months now.
Searched other threads for solutions but could not find anything applicable.
Up until a few weeks ago, everything about this phone worked great. But I dropped it onto concrete sidewalk (basic case didn't do much) where the case and back popped off (battery stayed in though). Later that evening I went to use the GPS but was unresponsive. Did some Googling for possible causes and ended up buying a new top cap (LS997) for a few bucks to see if that would fix it - unfortunately it did not. Tried putting on my original factory back cover (current factory back case has magnet attached) but GPS still dead. All other network stuff work just fine (at least BT and WiFi which is all I use).
So I removed the top cap again to see if any of those tiny springs/contacts were goofed up, and noticed that my phone does not exactly match the one shown in this post:
https://forum.xda-developers.com/showpost.php?p=78264829&postcount=11
If you look at the two contacts on the right side of stevejs's H918, my LS997 only has the (EDIT) contact on the right side - the left one is not there. Could it have been knocked loose from the fall, then when I originally took off the top cap to inspect, that one contact fell out without me noticing? Both my endcaps have the same contacts as shown, so nothing appears to have been dislodged from it. Not sure if another LS997 owner can check their phone to confirm...
Besides buying another phone (V20 or otherwise) to have a working GPS again, any suggestions from this community for a possible repair?
I tried to link steve's image below with my note in yellow (link is to my photo via my Google acct), but not sure it'll display correctly - thus my verbal explanation above of the missing contact.
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So...no suggestions?
I remember I used to have a ppc6700. That was one of the original smart phones, probably 18 years ago.
Those didn't have built in GPS. However, I was able to get a Bluetooth GPS for it... Relatively cheap.
Imagine those are still available for sale and that would solve your problem on the cheap. Probably mountable in your car.
Thanks for the reply, though probably won't go that route. If a local repair shop can't diagnose or repair, I'll just buy a NOS V20 from ebay and call it a day.