My nokia 6 phone with cracked screen after being in water - does not charge properly, and problems began from March (when phone accidentally fall in water) to 20 April (when i tried to charge from broken usb cables and the battery capacity fall down to 1500 mAh)
After service center repair (they replaced the broken usb-B port, battery and screen) I tried different USB cables and the problem with charge still exist.
As on screenshot i charge phone from AC adapter, and app showing that it's USB - not AC, charging speed is very slow, but instead of charge it slowly discharges until i connect to computer with only usb cable.
Maybe it's a Android 9 update bug? I going to do factory reset to try to solve this bizarre charge issue but before doing it i decided to ask here for help, maybe problem in charger controller.
Turn it off.
It needs to be dried out asap.
Take the rear cover off and disconnect the battery. If it's not an LCD* display, anhydrous isopropyl alcohol can be used to chase the water.
Apply liberally allowing it to drain off, get it everywhere, dunk it even. Then get as much of the alcohol out as fast as possible.
Low (5-10 psi) pressure oil free air can be used.
Or a fan. In a room with very low humidity allow to completely dry. Isopropyl is hygroscopic so dry air is important.
Reassemble in a room that's RH is 50-80% to help mitigate the risk of ESD damage while handling.
Best to always wear a ESD strap and follow ESD protocols when disassembling a phone.
*never expose a LCD display to solvents or alcohols, they will poison the display!
blackhawk said:
Turn it off.
It needs to be dried out asap.
Take the rear cover off and disconnect the battery. If it's not an LCD* display, anhydrous isopropyl alcohol can be used to chase the water.
Apply liberally allowing it to drain off, get it everywhere, dunk it even. Then get as much of the alcohol out as fast as possible.
Low (5-10 psi) pressure oil free air can be used.
Or a fan. In a room with very low humidity allow to completely dry. Isopropyl is hygroscopic so dry air is important.
Reassemble in a room that's RH is 50-80% to help mitigate the risk of ESD damage while handling.
Best to always wear a ESD strap and follow ESD protocols when disassembling a phone.
*never expose a LCD display to solvents or alcohols, they will poison the display!
Click to expand...
Click to collapse
I saw a sligtly dark area under left broken display corner on the first day of damage from water (not from alcohol) and i left the phone laying on display, because i was unable to detach the screen, next day I tried to use hairdryer to help to dry and it didn't help, but after two days dark area disappeared. Only after two weeks (when phone refused to charge) i gived the phone to service center. In service center (before they assembled phone) repairman said that new battery could be charged manually but not from USB port because of "falling voltage"
nikitam2498 said:
I saw a sligtly dark area under left broken display corner on the first day of damage from water (not from alcohol) and i left the phone laying on display, because i was unable to detach the screen, next day I tried to use hairdryer to help to dry and it didn't help, but after two days dark area disappeared. Only after two weeks (when phone refused to charge) i gived the phone to service center. In service center (before they assembled phone) repairman said that new battery could be charged manually but not from USB port because of "falling voltage"
Click to expand...
Click to collapse
That tech was useless.
Can it be fixed, how much?
Most likely not.
Even if "fixed" new damage will likely manifest itself. Any corrosion must be found and removed. This can be a daunting and near impossible task if the water damage is extensive.
You may have damaged/destroyed the c port PCB and/or the mobo, display, ribbon cable contacts, switches etc.
Never power up a water compromised phone. It's imperative to remove battery and all the water asap.
Water is conductive (with readily found contaminants) and corrosive especially with power applied. The corrosion once formed continues to attack the metal unless completely removed. It may take days, weeks or years to cause another failure. Rust never sleeps.
If a ready fix isn't getting it, it's be$t to ditch the device now. Prompt action can save a device.
Any delay can easily total it. If any salt* is present, it's already dead.
2 years ago the case for my Buds went straight to the bottom of a cup of coffee (cream and sugar). I tore the case apart, flushed it with RO water then with anhydrous isopropyl alcohol which I always carry. Dried it for 2 days, disassembled with the battery in it as it was spot welded.
It's still functional today.
It's possible to save a device but it's a very limited window of opportunity in most cases especially if the battery can't be pulled immediately... I got lucky.
*salt ie sweat, sea water is sure death
blackhawk said:
That tech was useless.
Can it be fixed, how much?
Most likely not.
Even if "fixed" new damage will likely manifest itself. Any corrosion must be found and removed. This can be a daunting and near impossible task if the water damage is extensive.
You may have damaged/destroyed the c port PCB and/or the mobo, display, ribbon cable contacts, switches etc.
Never power up a water compromised phone. It's imperative to remove battery and all the water asap.
Water is conductive (with readily found contaminants) and corrosive especially with power applied. The corrosion once formed continues to attack the metal unless completely removed. It may take days, weeks or years to cause another failure. Rust never sleeps.
If a ready fix isn't getting it, it's be$t to ditch the device now. Prompt action can save a device.
Any delay can easily total it. If any salt* is present, it's already dead.
2 years ago the case for my Buds went straight to the bottom of a cup of coffee (cream and sugar). I tore the case apart, flushed it with RO water then with anhydrous isopropyl alcohol which I always carry. Dried it for 2 days, disassembled with the battery in it as it was spot welded.
It's still functional today.
It's possible to save a device but it's a very limited window of opportunity in most cases especially if the battery can't be pulled immediately... I got lucky.
*salt ie sweat, sea water is sure death
Click to expand...
Click to collapse
I'm Sorry that I didn't answer to you almost a year, but you see the little detail on the screenshot, the Charge Speed is 185mA, AND it's very slow. I tested portable charger today and my Nokia is charging VERY SLOW, the InfoApp shows charging speed 300-450 mA with portable charger but when i connect charger to outlet the app shows SLOWER charging speed 10-180mA so i think it refuses to charge from the outlet (glitch)
I saw somewhere on this forum that "i should clear cache partition to clear battery profile cache" but I can't find that message now...
The phone was at service repair in May 2021, they replaced the battery , cracked Corning Gorilla glass, IPS screen and damaged microUSB-B port but the glitch with slow charging did not disappear even after repairs
So i think the factory reset or cleaning the cache partition would resolve the "charging glitch" problem
Related
Hi guess
my phone s4 9500 Water leakage him
when batterie empty , I never did not want to engage in
i watch video in youtube how to fix it and clear the phone but nothing
i buy a VolteMetre Which is used in current measurement
how i can fix it thanx Friend
You have to let it dry for like 2-3 days
i leave him more than one week
nothing
This device is deader than a doornail.
If you absolutely must fix this device, purchase a new motherboard. Otherwise, get a newer device.
friend how i can't get where is the problem
With the exception of distilled water, all water on the planet has chemicals and minerals that are floating about in solution between the water molecules. Depending on the location, some municipalities will chlorniate and flouridate the water; the former to guard against bacterial contamination, the latter to enhance the strength of teeth. In combination with electrical current, the chemicals and minerals corrode metal pins and contacts, either breaking the connection, or causing a bridge between two connections. Eventually the combination of the corrosion and the electrical current will destroy the components, causing the device to die.
If the device was only dipped in water for a few seconds and quickly snatched out, it may be salvageable so long as the battery is pulled quickly and the device buried in something that absorbs water, like rice. If the device is in water for longer than a few seconds or so, then the device is likely dead. In your case, your device is dead, and you should be looking into a newer device.
how i can't test if there a problem in this
fpc connceteur
To be quite blunt, it's up to you if you want to spend the time trying to trace every single component for signs of damage, but you'll be spending a LOT of time doing so. With water damage, every component on the board has either corroded connections or has completely burned out. It's unlikely you'll be able to revive the board, and it's much too labor intensive to make it worthwhile, which is why your only real options are what I gave you in post #4 of the thread.
I have my s7 Edge for 6 months and I've never had an issue with its water resistance until these issues came up. I was at Boracay island in the Philippines and when I was snorkeling in the sea, I swam with my phone s7 Edge and took videos under the sea which is salted water.
Scene 1:
- When I got back at my hotel, the first thing I did was to wipe it with towel and blow dry it with a blower especially the USB port and plugged it in the USB charger, as expected it didn't charge since moisture detection prompts. And so I left my phone not charging and slept
Scene 2:
- After I wake up, the first thing I did was to charge my phone, it did charge and I called my brother, my brother hears me very well. But on my 2nd call, the charging was cancelled and the moisture detection appears and my brother cannot hear me anymore unless I turn on the loudspeaker so that the top MIC would also work. Basically my USB port for charging and my bottom MIC has been busted until now.
Scene 3:
- After 3 days, I got back in Manila and the first thing I did was to rinse the phone with water. I rinsed the ports especially the USB port and the bottom MIC. And wiped it with towel and buried it with rice grains. I waited for a complete 24 hours and after that, the bottom MIC works (I test it with voice record) and the charging of the USB port works, however, while charging, somebody called me and right after I answered the call, immediately the moisture detection appears and my caller cannot hear me. The bottom MIC isn't working again.
What should I do now? I'm trapped with this issues for 1 week. I can't even use my phone normally. Please help me.
Hard lesson learned. Do not swim with a non-water proof phone. They are water resistant only like it would survive in a cold shower.
krico said:
Hard lesson learned. Do not swim with a non-water proof phone. They are water resistant only like it would survive in a cold shower.
Click to expand...
Click to collapse
But I've always swim this phone in pool or lakes but never in salted water. Sad to say, it went more worst.
There's no moisture sensor on S7 but the phone can detect a short circuit in USB port which are assumed as wet port by software.
Probably some salt or some contamination still remain. My suggestion is to fully submerged your phone in clean water for awhile to clean out as much salt as possible.
Salt water is corrosive and conductive, it's the worst for any electronic including water resistance one. So the first thing you should do immediately after your phone is in contact with salt water is to clean it with clean water and be careful next time.
Sent from my SM-G935F using Tapatalk
NonXtreme said:
There's no moisture sensor on S7 but the phone can detect a short circuit in USB port which are assumed as wet port by software.
Probably some salt or some contamination still remain. My suggestion is to fully submerged your phone in clean water for awhile to clean out as much salt as possible.
Salt water is corrosive and conductive, it's the worst for any electronic including water resistance one. So the first thing you should do immediately after your phone is in contact with salt water is to clean it with clean water and be careful next time.
Sent from my SM-G935F using Tapatalk
Click to expand...
Click to collapse
Brilliant idea sir. How many minutes do you think I should submerge it? Also, should I put it in the rice grains after I wipe it to remove other moistures inside the phone?
Update as of 11:25am (Philippines Time) of 11/23/2016
I tried to submerge it in a mineral drinking water for almost 5 minutes and wiped it and buried it under a pile of rice grains. After 15 hours of waiting. I picked it up again, boot it and immediately I went to the "Voice Recorder" app and press the record button. (My brother is beside me playing Mobile Legend)
Here's an example of the outcome:
(Voice recording file inside the attached zip file)
And I charged it in the charger and the Moisture Detected dialogue box appears again.
Any suggestion?
Go to the service centre and clean ur phone with IP ( they oil like liquid they have ). Thats it after cleaning internal hardware for 10 mins rubbing it with a soft brush plug it to charge swtiching the mobile off. U r good to go
hardik190 said:
Go to the service centre and clean ur phone with IP ( they oil like liquid they have ). Thats it after cleaning internal hardware for 10 mins rubbing it with a soft brush plug it to charge swtiching the mobile off. U r good to go
Click to expand...
Click to collapse
Usually the technicians here in the Philippines, assumes the motherboard as the faulty hardware if any hardware function is not working aside from the LCD and touchscreen. So do you think I should advise them that the only problem of the phone is cleaning and they should just clean the internal parts of the phone? And also, will it still be water-resistant even it has already been opened?
tyrande101 said:
Usually the technicians here in the Philippines, assumes the motherboard as the faulty hardware if any hardware function is not working aside from the LCD and touchscreen. So do you think I should advise them that the only problem of the phone is cleaning and they should just clean the internal parts of the phone? And also, will it still be water-resistant even it has already been opened?
Click to expand...
Click to collapse
Yes just tell them to polish the hardware
The moisture warning persists because there are 2 papers inside the phone, when they get wet the moisture warning popsup. U drowned the phone in salty wster by which the moisture got on paper as some salty particles sitck outside and the inside water was still wet. The other hardware also get moisture if its not polished in 5 hours. The heat makes the salty water to dry and keep a micro layer on hardware which kills the functions.
The water restiance depends on how properly they pack the device. There is no way to stop enter the water gettinf inside the device . The phone is water resistant not water proof so dont dive with it. Good luck
Hello,
my Redmi Note 7 fell in the water of our harbor and it took ~15min until we were able to find it. The water was ~1 meter deep.
I put the phone in rice for 4 days strait away. At some point the phone started but was discharged the next day. After that the phone did not start or charged anymore but showed a battery symbol.
We took the phone apart and cleaned everything with pure alcohol. We replaced the battery too. I took a few measurements: There is 5V on the battery test point and 4.8 V too.
At some point the phone showed 80% while it was off and attached to a charger today.
At the moment the screen goes on for a very short time ~1-2 sec. when powered on but does not charge when connected to a charger.
What could I do to bring it back to live?
I mean there are working parts in it as it looks like.
It's DOA.
The only way to save it was to pull the battery asap (in salt water even that might not be fast enough), disassemble, flush liberally with warm RO water, flush, flush, then flush with anhydrous isopropyl alcohol to absorb the water, dry for at least 2 days with a fan in a warm room.
Water is the best solvent for brine...
What has happened is water/alcohol insoluble corrosion has formed on contacts and any exposed conductors. BGA chipsets, flat pack ICs, power circuits and PCB traces may be shorted out completely especially V+/ground rails. Once this happens it's beyond salvage... sorry.
You could try a pulling all connectors and dumping the whole lot minus the battery and frame into a mild acid bath for an hour then rinsing throughly with RO water, then isopropyl alcohol, drying etc. Which acid, concentration, and time? Probably very diluted sulphuric acid. It's a mix of copper, silver, tin and more alloys you're trying to clean.
That's the only way to remove the corrosion if present. The acid could easily destroy exposed (no conformal coating) fine pitch PCB traces. As long as any corrosion remains it will continue to corrode.
I don't give it a good chance of working...
Oh man that sounds bad. I thought there would be a chance as it was more sweet water than salt water and the phone worked after the incident for a short time.
muebau said:
Oh man that sounds bad. I thought there would be a chance as it was more sweet water than salt water and the phone worked after the incident for a short time.
Click to expand...
Click to collapse
Disconnect the battery.
You can try disassembling it again. Pull all ribbon cables and connectors. Place in warm/hot RO water, clean contact surfaces the best you can with a toothbrush or a ultrasonic gum cleaner if you have one. Try to get some water flow under the BGA chipsets.
Replace the RO water at least 2 times and leave in it for a couple hours*.
Inspect contacts, surface mount devices, traces, etc with good light and a optic aid for signs of corrosion damage afterward. If none if seen proceed to the 99% isopropyl alcohol flush and dry completely. It might work....
*water may get in between the display and screen. If so it will leave a residue upon evaporation. This must be purge before reassembly. A vacuum drying chamber can be used. Use your best judgement how the proceed with the washing phase depending on this issue.
If it's sealed, no worries otherwise you may wish to modify the washing phase to be less invasive by limiting time and exposure to the display.
The contacts on the display is what really needs to be cleaned...
Today I found the phone is alive indeed. After lots of cleaning with alcohol it came back to live. Everything work.
The only issue I have is water (or alcohol) in the display now. This causes little clouds of brightness and the many random touch events.
Its there something smart I could do to get rid of this last bit of water except a vacuum chamber. It might vanish if I heat up the phone for several hours near/on the heating with a towel in between (not to hot).
muebau said:
Today I found the phone is alive indeed. After lots of cleaning with alcohol it came back to live. Everything work.
The only issue I have is water (or alcohol) in the display now. This causes little clouds of brightness and the many random touch events.
Its there something smart I could do to get rid of this last bit of water except a vacuum chamber. It might vanish if I heat up the phone for several hours near/on the heating with a towel in between (not to hot).
Click to expand...
Click to collapse
It's never a good idea to clean everything with solvents such as isopropyl. It can weaken many of the adhesives used in electronic devices, and it will ruin your display panel. If you have access to a temperature chamber, you can try removing the battery, putting the device in a bag of rice or desiccant beads, and let it heat soak for about 2 hours at +60c.
Chances are your display and touch panel are ruined, however. NEVER soak a device in alcohol or any other solvent.
Well the alcohol "everywhere" was an accident and bad luck. It happened while I cleaned just the last parts and connections. I will try to remove the battery and put the device with rice somewhere warm with a thermometer to check the temperature.
Thanks for the help. I will report what happens next.
I am able to get the few messages and photos from the day it fell in the water now. So I am near a 100% data (backup from ~2am + current backup) rescued scenario very soon. I am very happy to have reach this point so far anyway.
muebau said:
Well the alcohol "everywhere" was an accident and bad luck. It happened while I cleaned just the last parts and connections. I will try to remove the battery and put the device with rice somewhere warm with a thermometer to check the temperature.
Thanks for the help. I will report what happens next.
I am able to get the few messages and photos from the day it fell in the water now. So I am near a 100% data (backup from ~2am + current backup) rescued scenario very soon. I am very happy to have reach this point so far anyway.
Click to expand...
Click to collapse
The accident was dropping it in brine water... without through rinsing it be a goner. Even with rinsing it still may eventually die.
Rice does not work. Heat does*.
Be patient.
Warm dry room with fan on it.
The problem now isn't drying but the residue left behind as the water/alcohol evaporates. Try using centrificule force to move the water although capillary may prevent this.
Try drying on end.
Careful use of a shop vac might work in a dust free room but could destroy the display. Use best judgement. At the worst if you just let it dry it probably will leave some water marks, maybe not.
*raise heat to 110-120°F if it's not drying after 2 days. Heat displaces water ie hot boxes used in tropics.
The phone worked perfectly with clouds of water in the display.
After I put the phone in a warm place to get rid of the last few parts of this moisture the screen was black and stayed this way.
Now the lowest part of the phone gets very hot when switched on. Its hot enough to burn your fingers. The funny thing is that with "scrcpy" I am still able to reach the screen and the OS works perfectly as normal. I guess the lower PCB with the USB-C is the part which gets this warm.
I am angry for myself as I could have lived with the few clouds in the display as a reminder to keep water and smartphones away from each other.
Better than broken ribs...
You would need to carefully separate the display from the glass and clean both. Probably bonded with a heat adhesive.
The hot running suggest the phone isn't completely dry or has damage. Pull the connectors off the port pcb and inspect both them and that board for visible corrosion damage.
Reexamine the mobo's power section for same.
It's all probably academic as it likely will fail completely in time. Rust never sleeps.
Ive gotten this tablet wet a few times, (Tab A, T510 2019 10.1) nothing serious, not underwater. this time i had it next to shower, and just got a little water on the screen. I wiped it off and used it for about 1/2 hour, then suddenly the bottom 3rd of the screen pixelated and it flickered. That only lasted a few seconds, then the screen lost some brightness, just looked a little gray.
So i powered it down. Since then, screen is black when it boots, but it does beep with the moisture detected error when I plug in charger. i have been able to power it off and on and get that moisture error, but black screen. when I plug it into PC, i get the Windows code 43 hardware error, device not recognized.
I don't have much hope for it, but thought I'd check here.
Thanks!
Disconnect the battery NOW.
Allow to dry a in warm dry room with a fan on it, with the back panel removed for at least a week.
Disassemble as much as you can easily do to speed drying.
If it's an AMOLED display there's more you can do.
ok, thanks! its TFT-LCD. I already have it apart, and just disconnected battery again. i will put it in a dry upstairs window with plenty of sun.
Raymodjp said:
ok, thanks! its TFT-LCD. I already have it apart, and just disconnected battery again. i will put it in a dry upstairs window with plenty of sun.
Click to expand...
Click to collapse
Don't fry it... sheild the LCD from direct sunlight by putting it down face first.
Put a fan on it too.
Disconnecting any ribbon cable ends that got exposed may help. However ESD becomes a potential issue as out of circuit components especially the mobo are suspectable to ESD damage.
Because of the LCD you can't use anhydrous isopropyl alcohol as a drying agent; it will poison the display.
You may get lucky particularly if you see no visible corrosion damage on the power sections of the mobo. IP68 means it might resist water, I never trust it. Useful to keep dust out though.
blackhawk said:
Don't fry it... sheild the LCD from direct sunlight by putting it down face first.
Put a fan on it too.
Disconnecting any ribbon cable ends that got exposed may help. However ESD becomes a potential issue as out of circuit components especially the mobo are suspectable to ESD damage.
Because of the LCD you can't use anhydrous isopropyl alcohol as a drying agent; it will poison the display.
You may get lucky particularly if you see no visible corrosion damage on the power sections of the mobo. IP68 means it might resist water, I never trust it. Useful to keep dust out though.
Click to expand...
Click to collapse
ok, thanks again. I have it face down with a fan on it, and i put it in a dry place that doesn't get much direct sunlight.
I really didn't think it got very wet at all. I definitely can't see any corrosion damage. The moisture detection on some Samsungs is very sensitive. Mine even goes off in the summer solely due to high humidity.
Raymodjp said:
ok, thanks again. I have it face down with a fan on it, and i put it in a dry place that doesn't get much direct sunlight.
I really didn't think it got very wet at all. I definitely can't see any corrosion damage. The moisture detection on some Samsungs is very sensitive. Mine even goes off in the summer solely due to high humidity.
Click to expand...
Click to collapse
You're welcome.
It's safe to put it in sunlight just not with LCD facing it. As long as it's cool enough to touch it won't harm it.
Most at risk are the powerc circuits carrying higher current loads which can accelerate corrosion damage. Or it may simply keep the signal tranfer on data circuits from working with no damage. The faster you pull the battery then dry it, generally the better the outcome.
I dropped my Galaxy Buds case in a cup of coffee (cream&sugar) over 3 years ago. Open it immediately, flushed with RO water, then anhydrous isopropyl alcohol, dried for a day, then drank the coffee. It still works today.
Hi all. My trusty A40 had a little mishap at the toilet (!) and drowned. I gave it a rinse with alcohol and dried it for days in 40C ovens etc. but no life was recovered. A few days ago I decided to try charging it anyway and nothing happened... then this morning my old alarm went off! The screen is still completely dead, and I didn't notice any vibration but I always had that turned off. When I plug it in and out with the USB cable it makes the correct beeps. I can even snooze that alarm with the power button and turn it off with volume down.
When I connect it to my PC though I don't see any drive come up, I guess it doesn't default to USB file transfer so maybe this isn't a surprise.
So is my phone alive inside and just has a completely dead screen? The alcohol has conveniently taken the back off by dissolving the glue. Also, I've already got a new Redmi Note 11 so I'm happy to tinker with this phone and I've replaced screens before no problem.
Is this phone worth buying a new screen for do you all think or would that be a total waster of $35?
Thanks!
(PS: sorry if not in correct forum here, not sure which one is most appropriate for hardware / repair issues)
Wrong. You may still be able to save it...
Pull the back cover and disconnect the battery asap. Allow to dry completely before powering up. Fan blowing on it with the phone on it's side in a very warm room for at least a couple days.
The mobo power section or the soc are the most likely areas to fail from corrosion. Possible the connectors are still retaining brown water
Do Not use anhydrous isopropyl alcohol as a drying agent if it has an LCD as it will poison it.
blackhawk said:
Wrong. You may still be able to save it...
Pull the back cover and disconnect the battery asap. Allow to dry completely before powering up. Fan blowing on it with the phone on it's side in a very warm room for at least a couple days.
The mobo power section or the soc are the most likely areas to fail from corrosion. Possible the connectors are still retaining brown water
Do Not use anhydrous isopropyl alcohol as a drying agent if it has an LCD as it will poison it.
Click to expand...
Click to collapse
Thanks but I've already completed the drying. The CPU is working in there, in fact when I put in a SIM it will even ring when I phone it. I'm just wondering if I can be 100% sure everything is OK apart from the screen? Is there anything else I can check?
DannySolo said:
Thanks but I've already completed the drying. The CPU is working in there, in fact when I put in a SIM it will even ring when I phone it. I'm just wondering if I can be 100% sure everything is OK apart from the screen? Is there anything else I can check?
Click to expand...
Click to collapse
If it's dry and still malfunctioning the damage is likely to the mobo, is permanent and will be progressive. Corrosion never sleeps.
You can disassemble and check the ribbon cable pins going to the display for moisture and/or corrosion damage. The mobo power section and the BGA chipsets* (can't see the damage as the contacts are under the chip) are the most likely to be damaged.
With water exposure time is of the essence. You might save the device if you're fast enough and do the right things. Salt water is sure death.
* you sure it's dry?!! BGA chipset's don't have airflow around the pins. Any water under the chipset will also be retained by capillary action...
blackhawk said:
If it's dry and still malfunctioning the damage is likely to the mobo, is permanent and will be progressive. Corrosion never sleeps.
You can disassemble and check the ribbon cable pins going to the display for moisture and/or corrosion damage. The mobo power section and the BGA chipsets* (can't see the damage as the contacts are under the chip) are the most likely to be damaged.
With water exposure time is of the essence. You might save the device if you're fast enough and do the right things. Salt water is sure death.
* you sure it's dry?!! BGA chipset's don't have airflow around the pins. Any water under the chipset will also be retained by capillary action...
Click to expand...
Click to collapse
I submerged the whole thing in alcohol and then dried it at 50C for 72 hours. Everything I can test works perfectly (including ringing when called) but the screen is totally dead. I cleaned that socket but still nothing.
Is it possible the water/alcohol damaged the screen and not the motherboard? Sound unlikely but that's what they symptoms indicate.
So is it worth a bet on fixing with a $30 new screen or not do you think?
DannySolo said:
I submerged the whole thing in alcohol and then dried it at 50C for 72 hours. Everything I can test works perfectly (including ringing when called) but the screen is totally dead. I cleaned that socket but still nothing.
Is it possible the water/alcohol damaged the screen and not the motherboard? Sound unlikely but that's what they symptoms indicate.
So is it worth a bet on fixing with a $30 new screen or not do you think?
Click to expand...
Click to collapse
I think it's the mobo but you're holding it. I don't know how suspectable the the display is to water damage. Did you use anhydrous isopropyl alcohol?
blackhawk said:
I think it's the mobo but you're holding it. I don't know how suspectable the the display is to water damage. Did you use anhydrous isopropyl alcohol?
Click to expand...
Click to collapse
All I could find was 100% ethanol I'm afraid and only realised the FAQs saying "alcohol" were talking about isopropanol after I'd finished. Isn't ethanol also used for mobo cleaning? Maybe that destroyed the screen though.
DannySolo said:
All I could find was 100% ethanol I'm afraid and only realised the FAQs saying "alcohol" were talking about isopropanol after I'd finished. Isn't ethanol also used for mobo cleaning? Maybe that destroyed the screen though.
Click to expand...
Click to collapse
Water can damage AMOLED displays as well it seems. Best to keep all solvents away from the display. Methanol alcohol should never be used.
Ethanol not sure about.
blackhawk said:
Water can damage AMOLED displays as well it seems. Best to keep all solvents away from the display. Methanol alcohol should never be used.
Ethanol not sure about.
Click to expand...
Click to collapse
OK I think then I'll shoot the moon and buy a replacement screen... would be a terrible waste to throw this phone out if that's all that's wrong.
Plus we would now know that ethanol is OK for phone motherboards, plus it takes the glue off the back of a Samsung A40!
DannySolo said:
OK I think then I'll shoot the moon and buy a replacement screen... would be a terrible waste to throw this phone out if that's all that's wrong.
Plus we would now know that ethanol is OK for phone motherboards, plus it takes the glue off the back of a Samsung A40!
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Use anhydrous (preferably 96% minimum 93%) isopropyl alcohol.
I wouldn't go too nuts trying to save it due the price point and especially the fact it has known water damage. Buying a used one in good condition be a viable option if you really like that model.
blackhawk said:
Use anhydrous (preferably 96% minimum 93%) isopropyl alcohol.
I wouldn't go too nuts trying to save it due the price point and especially the fact it has known water damage. Buying a used one in good condition be a viable option if you really like that model.
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I've just notices that with this model there is a pretty hefty flex between the top and bottoms boards with a connector on each end. This must also carry screen data so I'll give that a good clean out.
Second hand AMOLEDs are impossible to find for the A40, they all have horrible burn in.
I'm going to get the INCELL LCD version already in a new front frame and go from there. Should still be a decent back up phone.
And the fun of fixing it is what it's all about anyway, right? :-D
You grossly underestimate the corrosion process that's likely been initiated. I'm not so optimistic about it ever being reliable again.
I can understand corrosion while the phone is wet... not after it's been soaked in alcohol and completely dried. The process doesn't continue.
I'm going to guess it's the screen only that's broken as I see no other issues... I bought a cheap LCD replacement already in a new frame for $30.
Let's see how it goes.
DannySolo said:
I can understand corrosion while the phone is wet... not after it's been soaked in alcohol and completely dried. The process doesn't continue.
I'm going to guess it's the screen only that's broken as I see no other issues... I bought a cheap LCD replacement already in a new frame for $30.
Let's see how it goes.
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Yes, yes it does. Most don't understand how insidious it is. The oxides formed are insoluble in water and alcohols. Many are hygroscopic and attract moisture, then you know what happens...
This is the same reason you never buy a flood damaged car. Even if everything is working it will start to fail sure as the sun rises in the morning.
Sometimes if you pull the battery before the flooding it can be saved... sometimes. Always check for signs of water damage when buying a vehicle. EV's just burn to the ground when water damaged
Energized circuits greatly exacerbate and accelerate the corrosion process. You see the results. The future is uncertain for that phone but it will likely eventually fail from that one prolonged exposure.
DannySolo said:
I can understand corrosion while the phone is wet... not after it's been soaked in alcohol and completely dried. The process doesn't continue.
I'm going to guess it's the screen only that's broken as I see no other issues... I bought a cheap LCD replacement already in a new frame for $30.
Let's see how it goes.
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tell results
OK so the new screen eventually arrived and I turned on the phone then plugged in the new screen... nothing. But I guess you have to plug in the screen and then turn it on, but that seems to be impossible with the A40 where you need to attach the middle frame for to use power/volume, and that blocks the screen connector.
Is there some way to bridge those little spring contacts on the PCB to reproduce a power on signal? Otherwise I'll just have to do the whole replacement process and see what happens at the end!
Just as well there's holidays coming.
DannySolo said:
OK so the new screen eventually arrived and I turned on the phone then plugged in the new screen... nothing. But I guess you have to plug in the screen and then turn it on, but that seems to be impossible with the A40 where you need to attach the middle frame for to use power/volume, and that blocks the screen connector.
Is there some way to bridge those little spring contacts on the PCB to reproduce a power on signal? Otherwise I'll just have to do the whole replacement process and see what happens at the end!
Just as well there's holidays coming.
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i do not know, sorry, never opened my a40, still using it right now