Develop Bugs

[Q] Motherboard damaged?

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.
Click to expand...
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?

Soldering advice needed

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
Click to expand...
Click to collapse
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

GPU fault after falling

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
Click to expand...
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

Cracked screen--Bought replacement--Dies when I swap

I have a black SPH-D710 on Sprint. I cracked the screen, so I bought a white replacement (glass, LCD, and digitizer) on eBay.
I took the phone apart and swapped the screens and reconnected the boards and it powers up great... except that I have no service. If I connect back to the cracked screen, it powers up great and I get great service. I was hoping for a quick and dirty swap, but it seems like there must be some code in the screen-side circuit board that is foiling my attempt. I found this video [goo.gl/YNLZE -- xda won't let me post links, yet] where the guy seems to suggest that my problem is the IMEI, but I don't have the first clue about trying to find that in the old part and moving it to the new one, if that's even the problem. I've combed the forums and don't see that anyone else has had this issue.
Ideas?

Did your original LCD get damaged? If not try just swapping the digitizer and using the original LCD. May require use of a hairdryer to separate the adhesive
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-EViL-KoNCEPTz- said:
Did your original LCD get damaged? If not try just swapping the digitizer and using the original LCD. May require use of a hairdryer to separate the adhesive
That's how I had to do mine..One day I was drink a little to much, climbed a tree and fell out, my screen was shattered. Hairdryer is the key, the lcd i got from ebay, was brand new but..I now have the ghost menu issue ever since I swapped digitizers (don't understand how or why). Also check the connections, I know it's basic, but hey you never know
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thatoneguy2 said:
-EViL-KoNCEPTz- said:
Did your original LCD get damaged? If not try just swapping the digitizer and using the original LCD. May require use of a hairdryer to separate the adhesive
That's how I had to do mine..One day I was drink a little to much, climbed a tree and fell out, my screen was shattered. Hairdryer is the key, the lcd i got from ebay, was brand new but..I now have the ghost menu issue ever since I swapped digitizers (don't understand how or why). Also check the connections, I know it's basic, but hey you never know
Click to expand...
Click to collapse
I have complete digitizer and screen for $50. Pm me if your interested. My parts are tested and flawless
Sent from my Genesis that does what Nintendon't
Click to expand...
Click to collapse

LCD is fine, just the glass is broken
The glass is cracked in one corner. The LCD itself is fine. The digitizer is fine. Basically the only thing I NEED to replace is the glass. The thing is, I have a replacement LCD with the glass attached, it's just that I lose service when I connect it. I'm just wondering if someone knows why, and if there's a workaround so that I don't have to screw around with trying to heat the glass off, break it even worse, and then be SOL.
Right now my phone works and the broken part is really only over the search button on the screen (which I never use anyway), but I was just hoping to restore it to 100% since I already bought the parts.

Broken connector!

Hi guys, i recently got an htc one x which had signal problem, going into detail, i found that one of the connectors of the antenna cable is completely wiped off (soldered out) from the motherboard. the cable itself is fine
Is there anything that can be done?
I mean can i connect the antenna cable (core wire) to somewhere else to get it working,
PS. Currently, i only get signal at a few places, that too outside in open areas where signal strength is high.
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Thanx in advance.

If you can try to solder the cable directly to the motherboard or try to solder the connector!

arun6106 said:
Hi guys, i recently got an htc one x which had signal problem, going into detail, i found that one of the connectors of the antenna cable is completely wiped off (soldered out) from the motherboard. the cable itself is fine
Is there anything that can be done?
I mean can i connect the antenna cable (core wire) to somewhere else to get it working,
PS. Currently, i only get signal at a few places, that too outside in open areas where signal strength is high.
Thanx in advance.
Click to expand...
Click to collapse
Hey,
sorry to hear that. I have dealt with similar connectors in the past (on a laptop wifi card - results were 30% less signal) and in my experience its better to buy the connector and soldier it to the board if you can.
Good luck with the repair

Thanks
peshko69 said:
Hey,
sorry to hear that. I have dealt with similar connectors in the past (on a laptop wifi card - results were 30% less signal) and in my experience its better to buy the connector and soldier it to the board if you can.
Good luck with the repair
Click to expand...
Click to collapse
@Thant Thanks for the reply, but where to solder it, nothing is left there, i'll post the pics of my phone's board to make it more clear.
@peshko69
Thanks brother, i'll let this in the hands of experts, will hand it over to a good engineer
I was just worried coz one repair person said nothing can't be done now, as connector isn't there.

arun6106 said:
@Thant Thanks for the reply, but where to solder it, nothing is left there, i'll post the pics of my phone's board to make it more clear.
@peshko69
Thanks brother, i'll let this in the hands of experts, will hand it over to a good engineer
I was just worried coz one repair person said nothing can't be done now, as connector isn't there.
Click to expand...
Click to collapse
Good idea

Shown the phone to 2-3 repair persons and they all said nothing can be done.