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USB port issues

I am having issues with my Captivate's micro-USB port being loose. This is my second Captivate, and although it's still under warranty, the first one was RMA'd with the same issue. I never drop the phone while charging, etc, and I've tried multiple chargers so I really can't see why this would be happening. Both phones were 1008 versions, not sure if the 1008 is known to have this issue, or if I just have horrid luck. If anyone here can solder / fix the phone, I'm hesitant to go to AT&T again, as last time they made me go to the store and have the person working there verify that the USB port was not broken (luckily it still charged if you held it a certain way, and even more luckily I was able to flash stock before returning it!). Anyways, this phone is a refurb, and I did call and almost get it replaced as soon as I got it, as it had this issue slightly upon arrival, but decided it would be a hassle. It's only been about a month since the RMA, so I'm pretty sure that if I try now, they're going to get very mean about it, and possibly try and send me a bill for the phone, not to mention, the guy at the AT&T store will probably think something is up.
Any ideas are welcome, I love my Captivate, and I was just getting into develping on XDA :S
Sent from my Cappy using XDA Premium App
I actually found a fix to my issue. I actually was looking at it one day, and figured that in theory, it should be easy to fix, so I (CAREFULLY!!!) took a small knife I had and gently bent the inner part of the port up just a tad (it looked like it was too far down, and yes, I know it's supposed to be far down, but not that far), and it actually worked perfectly.

Thats weird... It kinda has to be what you're doing with it, since mine doesn't even have an irregular slight wiggle.
Obviously it could be just your luck but i doubt it.
edit: and who cares if the att dude thinks somethings up... its your $500..

Like I said, the second one actually had the issue upon arrival, but it was barely noticeable (the USB port would work, but if you moved the phone a lot, etc, it'd disconnect, then reconnect). I called in and talked to them, but decided not to RMA because it'd be a pain (in hindsight I should have...), and the problem just got worse.

Is the port internally lose? Or just when you plug a cable in it wiggles alot? Ive heard about people stretching the casing inside the port from alot of flashing (plugging in the usb). But if the hole port moves inside the phone thats no good lol. You should try to locate a nearby device service center and show them the problem and make sure you walk out with refurb thats fine. Dont worry about the people at atnt questioning it. Hell I use to walk in and just say "gps dosent work" and they would switch it out no questions.

What you said makes sense, the port looks like it's pretty sturdy, it's just that the cable wiggles a LOT, and it makes it hard to get it to even register.

I had the same issue but a new cable solved it
Sent from my samsung captivation

erraz said:
I had the same issue but a new cable solved it
Sent from my samsung captivation
Click to expand...
Click to collapse
I also had this issue, i opened up the stock Samsung Cable end to find that two of the four wires had insufficient strain relief and broke off at the solder joints

Oddly enough I had issues with the first cable as well, but I replaced it, and have tried others from my current.

Finicky USB port

So my USB port is being a little temparmental. It likes to charge only in a certain position. When playing music it does the same thing. Odin same thing. YOu get the idea. Obviously a loose connection inside the phone. Anyone every rip one of these things open and resolder this component? It's only a matter of time before it fails completely so I figure if no one else has done it I might as well give it try. Either that or get more batteries and a charger but that might hose me for Odin!

Have you verified it's not the cable? I had to replace one due to weird connectivity issues.
Sent from my SGH-T959V using XDA App

While your USB port still works, you should probably Odin a stock ROM and send it back to T-Mobile.
It would suck if your USB port completely died and T-Mobile won't replace your phone. It happened to one of the members on this forum. I forgot his name though.

Cables not the problem. It's the port itself. As far as TMOB goes no way to send it back to them. I got out of my contract a month and a half ago and switched to ATT. I like taking stuff apart and trying to fix it so worst case I try and kill the phone. Best case I fix it. Just looking to see if anyone here has ever ripped this thing open. Advice or tips would be great. Obviously I'm not to worried about voiding the warranty.

You could try the Vibrant and i9000 forums, I guess? The Vibrant community has opened their phone to install a FFC, and they might have come across the USB port. It might be similar to the SGS4G.
Just a suggestion. *shrug*

bkoon, that is a really good idea. i the vibrant and 4g have the same chasis, i think. you should be able to follow the video guides on how to add the ffc to the vibrant and be able to resolder the usb port. but you have to be careful with the soldering (im not sure how good you are with it), that could short circuit some things in the phone.

Thanks for the suggestion bkoon. And jager I know how to solder pretty well. Hopefully get around to it this weekend.

bkoon1218 said:
While your USB port still works, you should probably Odin a stock ROM and send it back to T-Mobile.
It would suck if your USB port completely died and T-Mobile won't replace your phone. It happened to one of the members on this forum. I forgot his name though.
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Click to collapse
That would be me. I managed to hold the plug just right long enough to stock get to KD1, and the second trip to T-Mo was successful. $20 processing fee, and the phone arrives tomorrow.
Back when I had a Blackberry Curve, I found a shop to replace the Mini-USB for about $65. That was my next step.

Please let us know how it goes! I'm sure we're curious as to how the insides will be like.
Good luck!
brutuspa said:
That would be me. I managed to hold the plug just right long enough to stock get to KD1, and the second trip to T-Mo was successful. $20 processing fee, and the phone arrives tomorrow.
Back when I had a Blackberry Curve, I found a shop to replace the Mini-USB for about $65. That was my next step.
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Click to collapse
Glad to know things worked out for you.

http://www.ifixit.com/Teardown/Samsung-Galaxy-S-4G-Teardown/4977/1
I know Google is tough to use sometimes so I thought I'd help

avrillapete said:
http://www.ifixit.com/Teardown/Samsung-Galaxy-S-4G-Teardown/4977/1
I know Google is tough to use sometimes so I thought I'd help
Click to expand...
Click to collapse
I've used ifixit numerous times. Fixed my laptop and my friends laptop. Thanks for the link though I would of never been able to find such a site on my own. Must be great to be that smart.

I would pay for schematics for the Galaxy 4g!!!

Hi again guys, so this morning i took my Galaxy 4G that was not charging the battery for some reason. And changed the charging port because i thought that was going to be it. Funny enough it didnt do the trick. So i checked, double checked and triple checked the solder points and everything was fine. I can read the 5 volts on the charging port pins but thats it. When i connect the usb to the wall, it shows like charging sequence is starting but then all of the sudden the screen will go off and thats it.
Ive been having a very similar situation with a couple infuse mobos i have, but just similar in terms of charging. If i put an already charged battery on the t959v it will turn on and work just fine. It even recognizes the debbuging mode. In fact after i changed the charging port i applied the unbrickable mod to the mobo and it worked perfectly. But still, battery wont charged. The infuse mobos wont turn on they just get stock in a bootloop. So please if someone knows about some schematic made for this phone or knows the route for those 5volts please help me... I would like to at least check the closest pins where those 5volts are supposed to go before giving up with that phone.

This seems like something bhundven, m4m4n or raverx3x would know... I would pm them . Good luck with the hardware tinkering.
EDIT
Asked bhundven for you. He said he hasn't found any .

No. If you find them, we would like them too.
But I doubt you will find them.
We do have the specification (user manual) for the s5pc110 (exynos 3110). but it is not specific to our phone.

Yeap, thats what i thought. I do have that for the i9000 and the original t959. I mean some pinouts i made myself using working mobos. But i dont have that for the t959v. And since the mobo is not working as it should i dont think i will be lucky trying to check pinouts on a non working mobo.

So, a friend brought me his galaxy 4g so that i could take it apart and check for the pins i was looking for. Shure enough i found them, but too unlucky it didnt matter. It seems like its either an ic or one of those resistors shorted. But anyways thanks guys
Ok people so im editing this post because ive found the solution for my problem. Guess what? So i decided to give it a try to the reflow blower on my soldering station. Since i thought it may have been some soldering points or something that had a lose contact. Well, it was!!! Now i have my galaxy 4G working again. Im going to open it back one more time and try to use flux so that i make sure the solder points are nicely welded. Never seen something like that on a galaxy phone but hey, It worked!!!!!!

I never charge my phone....I bought an OEM external charger that came with 1 battery and then bought 3 OEM batteries for $6.00 each.
This way the only time I need the port is to hook it up to the comp.
Just a thought

Yeah, thats actually a good idea to keep your phone working. But the thing is that i do have a bunch of phones. Many of them because i buy them from friends who have them and something is wrong with them(Phones). So i buy them cheap and use them to test things and have fun flashing or stuff like that. And that one was the case, in fact, i bought it because the phone wasnt charging. But i thought the solution was to change the usb port since i saw the + contact inside the port twisted. But i changed the port and it didnt work. Like i said on a different thread, i work with electronics on a daily basis so for me this is just fun...

enelyam said:
Yeap, thats what i thought. I do have that for the i9000 and the original t959. I mean some pinouts i made myself using working mobos. But i dont have that for the t959v. And since the mobo is not working as it should i dont think i will be lucky trying to check pinouts on a non working mobo.
Click to expand...
Click to collapse
Good day sir I noticed you said you have schematics for Samsung T959. Is this true? I am looking for schematics to apply the unbrickable mod with the xOM5 resistor. Do you have schematic for this? Can you please share?

alexragwen said:
...unbrickable mod...
Click to expand...
Click to collapse
Those of us with an interest in kernel development would still kill for schematics or board traces. Neither have ever surfaced, that I know of. I believe that the previous poster was referring to the various SoC documentation that has been out there, but that won't tell you where to put the resistor.
The SGS4G is pretty unbrickable as it sits, as long as you don't muck with the bootloaders.
If you still want the unbrickable mod, I'd search through these SGS4G forums as I think @bhundven may have looked into it or done it. Search is your best bet as I think he's taking a break from phone-dev work.

Kit Kat is out... Gimmie a break!
jeffsf said:
If you still want the unbrickable mod, I'd search through these SGS4G forums as I think @bhundven may have looked into it or done it.
Click to expand...
Click to collapse
Actually, @AdamOutler did the modification for me, but I risked the sacrifice to make it possible for our device (SGH-T959V/W).
See: This and this.
jeffsf said:
Search is your best bet as I think he's taking a break from phone-dev work.
Click to expand...
Click to collapse
Yes, I'm currently taking a break from phone hacking. I'm working on my own mental health and focus on my work.

Well, i dont think youll need an schematic to apply unbrickable mod. To be honestm pictures attached by Adam look way too clear for us to miss it. Thruth is i have been looking for a couple mobos schematics and been able to find some. For example last week i needed the N7000 Galaxy Note schematic to find the sim card pinout for a customer who broke the soldering on the mobo of a N7000 Galaxy. Lucky enough i found it. So, search will always be our best tool.

MHL HDMI Adapter working on one Note 4, but not the 2nd Note 4

I have 2 Galaxy Note 4 phones. Love em. They are both running the same configuration, Android 6.0.1. I have an MHL adapter that I have used on may devices for quite a while and it works great. However, it only works on one of my Note 4 phones. I am totally baffled. I spent a couple hours reviewing the settings on both phones to see if something was different. I even upgraded it to 6.0.1/Marshmellow and when that didn't work I did a factory reset. I have read every troubleshooting guide and nothing seems to work. I guess what I am looking for is someone who understand what I should be looking for....
Clearly its not the adapter since it does work on the one Note 4.
It seems to me this is likely a hardware problem because of the fact that I did a factory reset, but honestly I can't really say. I don't think the lcd digitizer would affect it, but just in case I pulled it and installed the one from the working phone. No joy.
Anyone know if there are hardware differences between Note 4s made at different times? I don't know what else to try but if anyone has an ideas please offer it as this has me stumped.
Thank you

May be a silly question but I ask it because I see you made no mention of it but have you checked and compared the charging ports between the two and is there any missing pieces or bent port pins, debris, pocket lint or anything else that would affect the connection to the phone?

ticholas said:
May be a silly question but I ask it because I see you made no mention of it but have you checked and compared the charging ports between the two and is there any missing pieces or bent port pins, debris, pocket lint or anything else that would affect the connection to the phone?
Click to expand...
Click to collapse
I don't think it is a silly question at all. For me, usually the problems I have the toughest time solving are often when I am looking for the complicated solution and forget the simple one starting at me. I just assumed the USB was ok because I can charge the phone and browse files. But obviously it has to be that. Really there is not much else it could be when I break it down. Now that I test it more closely the file transfer is not the best on this phone.
I guess I needed to hear that. Yeah so it seems quite obvious now. I just replaced the lcd digitizer so I may as well go ahead and replace the charging port while I have the phone apart since I can buy one for +/- $10.
Thank you for the input. This was an easy one after all. Well...let's hope. I will post again once I receive and install the part.

cbicker said:
I don't think it is a silly question at all. For me, usually the problems I have the toughest time solving are often when I am looking for the complicated solution and forget the simple one starting at me. I just assumed the USB was ok because I can charge the phone and browse files. But obviously it has to be that. Really there is not much else it could be when I break it down. Now that I test it more closely the file transfer is not the best on this phone.
I guess I needed to hear that. Yeah so it seems quite obvious now. I just replaced the lcd digitizer so I may as well go ahead and replace the charging port while I have the phone apart since I can buy one for +/- $10.
Thank you for the input. This was an easy one after all. Well...let's hope. I will post again once I receive and install the part.
Click to expand...
Click to collapse
Update?

[DISC] Changing motherboards between different models

Hey everyone,
recently my SC-02h (Jap Docomo version) hard-bricked and has no way to recover besides JTAG or motherboard replacement.
This made me think of an experiment.
Can you replace any motherboard (which includes all chips and the storage) with another.
I ordered the g935FD dual sim version with the Exynos chip, this compared to my QC single sim version which is currently bricked.
Hopefully within the next few days I'll receive the motherboard and start the replacement process (I will probable film it) to see if it works.
If so, anyone could replace their motherboard by a new one that is unlocked or has a different chipset.
Please discuss here if you're also interested in changing your own mobo with another.

Can't see why it won't work as the motherboard is what determines the model. Just make sure you order up a dual SIM tray too.

Motherboards from different chipsets *may* have different connections on how things wire up. I'm not saying they do, I'm just thinking out loud. I'd only buy a replacement motherboard from the same variant.
And good luck finding a new motherboard. At the price they sell for, you'd be better off buying a whole new phone.

Would like to see how this goes. Please record the process.
Sent from my SM-G935T using Tapatalk

lyriquidperfection said:
Can't see why it won't work as the motherboard is what determines the model. Just make sure you order up a dual SIM tray too.
Click to expand...
Click to collapse
Yea I ordered that one, although I thought the tray looks the same (bottom part), so until my new one arrives I'll use the older one.
the_scotsman said:
Motherboards from different chipsets *may* have different connections on how things wire up. I'm not saying they do, I'm just thinking out loud. I'd only buy a replacement motherboard from the same variant.
And good luck finding a new motherboard. At the price they sell for, you'd be better off buying a whole new phone.
Click to expand...
Click to collapse
I checked the connections and they are the same, the only thing that differs is the sim holder and the chipset.
Also a new phone (unlocked) costs at least 2,5times more (live in Japan).
dogredwing1 said:
Would like to see how this goes. Please record the process.
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
I'll record it on video as soon as it arrives, also the process of taking it out and replacing it completely. So if it ends up in failure you can all see it.

In what way is it bricked? The S7 is almost impossible to brick.

CuBz90 said:
In what way is it bricked? The S7 is almost impossible to brick.
Click to expand...
Click to collapse
Hmm I flashed a rom with TWRP, (lineage, but wrong build) after that I rebooted and the phone stopped responding completely.
So black screen, no led when charging, no response at all when pressing buttons.
Even disconnecting battery and reconnecting didn't work.
Also no recognition in windows when connected to USB

totalvamp said:
Hmm I flashed a rom with TWRP, (lineage, but wrong build) after that I rebooted and the phone stopped responding completely.
So black screen, no led when charging, no response at all when pressing buttons.
Even disconnecting battery and reconnecting didn't work.
Click to expand...
Click to collapse
Can't get to download mode?

CuBz90 said:
Can't get to download mode?
Click to expand...
Click to collapse
Well if I could I wouldn't be ordering a new MoBo
Even made a USB JIG

Another thing you might lose is waterproofness. I cracked my screen badly and instead of repairing it at a 3rd party shop, I sold it and got a new one. Coz it won't be waterproof anymore..

thedisturbedone said:
Another thing you might lose is waterproofness. I cracked my screen badly and instead of repairing it at a 3rd party shop, I sold it and got a new one. Coz it won't be waterproof anymore..
Click to expand...
Click to collapse
i should be fine, just get it glued back together properly.
besides i don't really care about it.

Unless the other components (camera, vibrator motor, various sensors, OLED Panel etc.) don't differ in the way they talk to the mainboard, I don't see why it shouldn't work. As others have said, I'd really love to see how it'll work out for you. So, thanks for sharing =)

Well it didn't work out, I put in the new motherboard but the phone didn't power on at all. There is also no led when trying to charge it. I'll be sending it back to the supplier and buy another version instead.

https://www.youtube.com/watch?v=jym2aNwRmkc
Made a video of the process and failure

totalvamp said:
https://www.youtube.com/watch?v=jym2aNwRmkc
Made a video of the process and failure
Click to expand...
Click to collapse
Was interesting to watch, however you only tried powering on twice and quit?
Connecting a charger had no effect?
Unless the board your received was dead to begin with.

totalvamp said:
https://www.youtube.com/watch?v=jym2aNwRmkc
Made a video of the process and failure
Click to expand...
Click to collapse
Can you share the link of where you bought the motherboard? It might be that you bought a blank motherboard. In that case you want it to be flashed with the correct IMEI and partition (table?). AFAIK the IMEI has to be that of your previous phone since you can't just "create" a new IMEI. Don't even want to get into the legal repercussions but here's a sneak peak; in some countries it's a criminal offence to alter an IMEI or even have tools to alter IMEI. Don't quote me on this and I'm asking the community to correct me. If the motherboard comes from a previously active device, it should have its own IMEI and none of what I said before matters.
Whatever, none of that necessarily explain why it didn't boot up. Have you tried charging and plugging it to a PC? If it isn't dead, your PC should at least detect A device.

murtaza02 said:
Was interesting to watch, however you only tried powering on twice and quit?
Connecting a charger had no effect?
Unless the board your received was dead to begin with.
Click to expand...
Click to collapse
Well I tried a few times after that and after letting it on a charger, still no response.
nitrous² said:
Can you share the link of where you bought the motherboard? It might be that you bought a blank motherboard. In that case you want it to be flashed with the correct IMEI and partition (table?). AFAIK the IMEI has to be that of your previous phone since you can't just "create" a new IMEI. Don't even want to get into the legal repercussions but here's a sneak peak; in some countries it's a criminal offence to alter an IMEI or even have tools to alter IMEI. Don't quote me on this and I'm asking the community to correct me. If the motherboard comes from a previously active device, it should have its own IMEI and none of what I said before matters.
Whatever, none of that necessarily explain why it didn't boot up. Have you tried charging and plugging it to a PC? If it isn't dead, your PC should at least detect A device.
Click to expand...
Click to collapse
http://www.ebay.com/itm/MAIN-MOTHER.../182310990269?ssPageName=ADME:X:RRNTB:NL:3160
It should be one with an IMEI how else can it be unlocked.
I tried plugging it in as well, but my PC doesn't recognise it at all.
I've ordered a different one this time, this motherboard was also slightly different from the one I had (2 cables instead of 3) so it might be incompatible.
I ordered this one now: https://www.aliexpress.com/snapshot/0.html?orderId=82116420384467&productId=32737224430

Did you end up having any luck with the second motherboard?
Or has anyone else attempted this before?
I'm looking to swap my qc chip for the exynos.

How was the operation??
Hello i'm interested to know how was the experiment becouse i wanna try almost the same thing, i have a s7 sm935fd and i wanna change the motherboard for a sm935f model. Please answer me!

I am also going to try swapping motherboards. How did yours work out?
Hi @totalvamp,
I am going to try swapping out a good motherboard from a banged up sprint G930P phone with a clean IMEI into a clean, whole, G930X demo model that I picked up cheap on Ebay.
The "X" demo phones work on WIFI only. I understand that the "X" motherboards are missing the cellular radios, which is why I am trying this swap -- it should be far easier and less costly than doing a full screen&LCD replacement, which requires tearing down the entire phone, and costs about $150. Hopefullly, I will just have to remove the back, the QI receiver and I think the camera, and I'll get access to the motherboard.
My hope is that all the rest of the parts are present -- we'll see how it goes.
I look forward to hearing from you.
Philip