hi there,
I had spilled water on the top of my galaxy nexus this morning and it wiped out the ear speaker. so i decided to open it up and eventually after some tinkering around I managed to fix it, however, I hadn't realised when lifting the mainboard that the volume switch was soldered onto it, and ended up breaking the connection. you can see it from the picture below. how can I solder this back? its a very small connection. i cant seem to find any videos or guides on how to solder back connections like this.
any help would be grateful, thanks
everything else with the phone is working fine though, but i lost the ability to go to recovery or bootloader
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Can't be done, you broke 2 of the connections from the ribbon itself.
You'll have to either buy a whole new ribbon, or a whole new board with the ribbon already soldered on.
The picture also seems to indicate the pad being lifted from the other board. If that is indeed the case (feel the area of the board for a depression), your repair just got a lot more expensive - you may need to replace the board too.
Below point may be moot given the damage in question, but the actual soldering is best done with a high power but temperature controlled soldering station like the Weller WES51. You also need lead free solder, fresh tip, very steady hand, and quite probably a third hand (a tool that looks like two posable alligator clips, to hold your work piece).
motopig said:
The picture also seems to indicate the pad being lifted from the other board. If that is indeed the case (feel the area of the board for a depression), your repair just got a lot more expensive - you may need to replace the board too.
Below point may be moot given the damage in question, but the actual soldering is best done with a high power but temperature controlled soldering station like the Weller WES51. You also need lead free solder, fresh tip, very steady hand, and quite probably a third hand (a tool that looks like two posable alligator clips, to hold your work piece).
Click to expand...
Click to collapse
i assume you mean the pads where the connection was? its ok its just that the soldered bits are abit lifted. the board doesn't seem to have any damage.
I've contacted Samsung about this, i hope they get back to me in time. i can still use the phone though, just cant change volume or get any vibrations lol
IINexusII said:
i assume you mean the pads where the connection was? its ok its just that the soldered bits are abit lifted. the board doesn't seem to have any damage.
I've contacted Samsung about this, i hope they get back to me in time. i can still use the phone though, just cant change volume or get any vibrations lol
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I never said the board need replacement because it isn't working , just that if the copper pad itself was lifted (or worse, torn) from the board, you will never be able to fully fix the connection yourself because you have nothing on the board to complete the circuit with, without going for more drastic measures.
Samsung may very well ask you to send the phone in, then I'm willing to bet that they'll swap the board as well. That is if they don't try to void your warranty.
yeah, so i ended up buying a faulty GN with a broken screen off eBay ill swap my screen with that one and sell mine too as faulty..
sad times, but ill be back
Related
Hi
My sister's G2 got wet and the lcd screen stopped working. The capacitive buttons, digitizer, and physical keyboard work fine.
However, someone took the phone apart before I came home and tried to diagnose the problem. I believe they may have damaged one of the connectors on the motherboard by bending (and perhaps breaking) some pins. I have attached a picture.
Should I go ahead and replace the lcd or is this damage just too much? The phone works save for the screen.
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Sorry, here's the pic:
http://tinypic.com/r/24y0gac/5
From physical appearance, it looks like the micro-sd card connector is spoilt, according to here. (Coincidentally, the touch panel ribbon is next to the Micro-SD connector)
After water damage, and probably some other motherboard faults resulting from opening the phone up without professional help, many things could've been probably either short circuited or damaged, besides the faulty connector. I'm not sure whether the phone will still boot up properly after these problems, let alone the screen not functioning.
I don't know about you, but if that happened to me, i think its best to get help from a professional or your service center.
xudsa II USERT said:
From physical appearance, it looks like the micro-sd card connector is spoilt, according to here. (Coincidentally, the touch panel ribbon is next to the Micro-SD connector)
After water damage, and probably some other motherboard faults resulting from opening the phone up without professional help, many things could've been probably either short circuited or damaged, besides the faulty connector. I'm not sure whether the phone will still boot up properly after these problems, let alone the screen not functioning.
I don't know about you, but if that happened to me, i think its best to get help from a professional or your service center.
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Click to collapse
Thanks for the advice and the reply. I'll consider seeking some techs in the area.
However, the phone boots up and the backlight turn behind the capactive buttons as well as the physical keyboard. The digitizer works because I can swipe across the screen (even though I can't see) and feel the vibration of unlocking the home screen. Also, the volume rocker works as well as the audio.
So, I may have gotten lucky. But it appears the microsd connector is damaged (not by water - by a person). I wonder if the top pins are just tension pins?
Hi everybody!
I wonder if there anyone have a spare parts for DesireZ (G2)? I need the mainboard itself for the repair. Thank you in advance for your help.
InteLeeGent said:
Hi everybody!
I wonder if there anyone have a spare parts for DesireZ (G2)? I need the mainboard itself for the repair. Thank you in advance for your help.
Click to expand...
Click to collapse
I have mine!
rooted and rom. With 4ext TOUCH RECOVERY
HMU
-Tyler Debel
Do you sell youre G2? or you have a spare mainboard?
Hello guys. I'm currently trying to fix a friends HOX that fell and now the screen doesn't always display image although we can see it always lighting up (it turns on but stays black) .
If I press hardly the HOX's area in red while turning it ON, it works fine. I'm assuming this could be some broken welding points but would like your opinion.
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I'm thinking of heating the area with a heat gun, but I'm afraid I'll kill the rest of the phone... what do you think?
Also, after disassembling the phone, the vibration stopped working and I've checked every flat cable and every connector I could find...no ideas to fix this one since it was working before I cracked the phone open.
Any comments are greatly appreciated.
Tks
Hi
casca said:
Hello guys. I'm currently trying to fix a friends HOX that fell and now the screen doesn't always display image although we can see it always lighting up (it turns on but stays black) .
If I press hardly the HOX's area in red while turning it ON, it works fine. I'm assuming this could be some broken welding points but would like your opinion.
I'm thinking of heating the area with a heat gun, but I'm afraid I'll kill the rest of the phone... what do you think?
Also, after disassembling the phone, the vibration stopped working and I've checked every flat cable and every connector I could find...no ideas to fix this one since it was working before I cracked the phone open.
Any comments are greatly appreciated.
Tks
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Click to collapse
Possibly a chip has become partly detached from the solder ball grid array due to the shock of the fall. You will not be able to repair this by heating, even if you could reach the melting point of the solder.
The manufacturer would repair by replacing the circuit board and the existing one would be considered unserviceable.
Regards
Phil
So in resume, my friend has a HOX for spare parts... damn...
Couldn't you pack the inside of the housing at the point where you need to apply pressure? Using a piece of card or something. Hardly ideal but would make it functional again
That has been my first attempt, and it's better but still, not enough.
I'm going to disassemble it for the tenth time in a final effort...
tks for the tip though!
So, I've just realized the back metal plate comes out nicely and I think I've found the problem for the GPU issue... that small component on the red area has a broken piece lol (WTF!)
I have applied pressure directly on top of it and I think it will be usable like this, but it now needs a bit of daily use to check if I'm right or wrong.
Can anyone identify what component type is that?
Also, unfortunately (and I don't have a clue how this has happened), the vibration stopped working after opening the phone on the first time, any one has any ideas of what to look for? I don't see any flex cable cut or any other damaged parts...
Tks guys.
Problem solved, some back pressure on the broken piece and the hox is good to go.
The only thing still not working is the vibration...
Sent from my HTC One X using xda app-developers app
Hi guys. Sorry if this is in the wrong thread but thought I'd post up to show how I fixed my note 2 wifi problem,
So my specific model is the sgh-i317m and I'm in the uk, bought the phone recently as I've always fancied one, anyhow when I got the phone home and set it up I had very weak wifi connection, no signal at all up stairs (would disconnect) and even if I was in the same room as the router I wouldn't have any wifi signal bars (unless I was smack bang next to the router)
Anyway I Googled the issues and saw 5 hat it is a common problem, tried all the usual stuff and nothing worked so decided to get my tools out. Anyway here is how and what I did, I'm not sayo g this will work for everyone but it worked for me.
I recommend you have a professional do this unless you have the knowledge and skills base.
Things you'll need;
Small screwdriver set,
Small tweezers
Magnifying glass (optional but makes it somewhat easier)
patience is key here.
Any how,
Once you've removed the back chassis from your phone and mother board you will see these prongs
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*this photo is from Google as I was doing this repair to my daily phone do couldn't use for photos* lol
Anyway on mine this prong had come loose and therefore wasn't contacting properly, I pinpointed this anyway as when you pressed on the back of the phone the signal would boost,
Anyway this is where you need your soldering iron, and a spare motherboard, you could possibly use something else but I had spare motherboards lying around so used one from a crapberry
So once you've let your soldering iron get up to temperature press it as close as you can to the underneath of this prong to liquidise the solder underneath, be patient, I held the soldering iron there for 10-15 seconds before it liquidised. you'll know when it's hot enough as the prong will move, I held it with small tweezers to make it easier.
So now you should have your old prong removed, move this away as not to get confused with the one your replacing it with. Repeat above steps for the one from your spare motherboard.
Once you've done that, if you have a flux pen lightly cover the solder pads, place your prong on them with the tweezers and hold it still, then hold your soldering iron on the prong for about 30-60 seconds to be safe, gently move away your soldering iron away from it and if it's tight on you've done it successfully.
I will post up some photos of the full process but this should be easy enough to follow. And I'm sure you'll be able to find a guide on you tube (if not I'll upload one)
Hope this helps. Feel free to comment with any questions etc.
Okay yes hi, I just bought a used Tab S from eBay the other day and I'm having a serious issue with it.
So, when I bought it I talked with the seller and he promised that everything was in perfect working order.
But today I got it, and neither the charging port, or the SD card slot work at all.
I tried taking the piece out of the tablet and put it into my old one, and both worked just fine, no problems.
So all I can figure is that maybe it's a problem with the mother board. Except, everything else is running fine, and I looked over the motherboard and everything looks fine as far as I can tell.
The only thing I notice that's different between this mother board and the one from my old tablet, is the connector where you connect the ribbon cable from the sd card slot/charging port, but it's just, under the ribbon, on the beige piece, two of the golden lines on it are still there, but like, there's something different about them.
Could two little microscopic bits like this really cause the whole thing to not function like this? I mean it just seems absurd that such a small thing can do this.
I'll take a picture of the spot if anyone would like to see it.
I'm planning on returning the tablet in a few days for a refund, but if anyone can tell me if there's like a simple fix for this I would be eternally grateful, it's taken me forever to find a tab s I can afford and my old one is constantly locking up so I really need a new one...
ElsaReyes said:
Okay yes hi, I just bought a used Tab S from eBay the other day and I'm having a serious issue with it.
So, when I bought it I talked with the seller and he promised that everything was in perfect working order.
But today I got it, and neither the charging port, or the SD card slot work at all.
I tried taking the piece out of the tablet and put it into my old one, and both worked just fine, no problems.
So all I can figure is that maybe it's a problem with the mother board. Except, everything else is running fine, and I looked over the motherboard and everything looks fine as far as I can tell.
The only thing I notice that's different between this mother board and the one from my old tablet, is the connector where you connect the ribbon cable from the sd card slot/charging port, but it's just, under the ribbon, on the beige piece, two of the golden lines on it are still there, but like, there's something different about them.
Could two little microscopic bits like this really cause the whole thing to not function like this? I mean it just seems absurd that such a small thing can do this.
I'll take a picture of the spot if anyone would like to see it.
I'm planning on returning the tablet in a few days for a refund, but if anyone can tell me if there's like a simple fix for this I would be eternally grateful, it's taken me forever to find a tab s I can afford and my old one is constantly locking up so I really need a new one...
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you have photos? Have you tried cleaning the connectors on the board? test using air pressure or blowing ..
lytoh said:
you have photos? Have you tried cleaning the connectors on the board? test using air pressure or blowing ..
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See at either end something about I guess the pins just looks off. But I'm not sure.
ElsaReyes said:
See at either end something about I guess the pins just looks off. But I'm not sure.
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mmm I'm not an expert but it looks like that connector has been soldered to the plate ... you can see two points of welding at the ends ... surely there you have the problem ..
The two pieces of plastic at the ends seem burned .. The first connector pin seems broken ... and the next 3 moves ..
I can also see something that looks like glue un the board ... can it be? They have manipulated it in a bad way .. I would contact the seller and get the money back ..
Look at the original connector .. your motherboard has been modified.
Hi all, I have been lurking for a little while and apologize for my first post being a request for help.
I have been attempting to unlock the bootloader on my Fire 7" 9th gen. I managed to make the tablet unresponsive, so had to disconnect the battery. In doing so, I damaged the terminals on the main board (I didn't realize how delicate those pins are). So I had the idea to remove the pins and solder the battery wires directly onto the board (I know, I know...).
Anyway, I managed to destroy the pads (see picture).
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So I started probing about to see where the non-damaged pads are connected to (as shown above). There are some things that aren't clear to me however.
1) What is the function of that third pad, I suspect it is also the ON trigger, but for a second cell?
2) The two positive pads go to VBAT, are these connected in parallel? Ditto for negative.
3) I can't quite work out from the traces if the labelled pads bypass the components in the photo, or if they are just additional connection points for diagnostics.
4) What is the circuit that these components form? Is it a BIM?
It looks to me as though what I have is a 2 cell battery, with individual positive, negative and control lines for each cell. If this is indeed the case, I'm thinking that I can "repair" my damage by connecting to these labelled pads instead. Of course, if these pads bypass the pictured electronics (a BIM/balance charging circuit?), then this is obviously not safe to do.
Any input would be greatly appreciated.
Well, you see how easy it was to damage them... what makes you think you can repair them?
Repair is much more difficult and tedious than simply unsoldering them.
You need a temperature controlled iron, tools, flux and most the skill level to do so.
You get that by practice and learn from failures.
Not being condescending but after doing this for decades I know how it goes.
Many times you get one shot at repairing it especially when you damage a trace or pad. Damaged plated through holes will need a fine wire inserted to replace the missing connection.
The foil traces and non through hole pads lift up very easily when heated. Multilayered PCBs can be damaged by excessive heat as well. Heat must be controlled, applied fast and accurately. To be soldered metal needs to be clean oxide free and tinned first, this includes fine wire jumpers. A lot of little skills are needed.
Solder tip must be completely tinned with lead based rosin core solder 63/37. Do Not use lead free solder. Wipe tip as needed and always keep it tinned and shiny.
Have extra rosin flux available and desoldering braid. Pad repair kits are available but hard to use and not as good as the original.
A skilled tech may be able to salvage it...
Hi, thanks for your input and advice on dealing with such delicate devices.
I have got another with a broken screen on eBay rather cheap, so I'll take the main board out of that.
Hi, thanks for your input and advice on dealing with such delicate devices.
I have got another with a broken screen on eBay rather cheap, so I'll take the main board out of that.