/diy/ - Do It Yourself

Boot loop that far into startup makes me think something connected to the baseband or possibly audio is shorted. Sure you can crack it open and swab out any corrosion you see. It's possible it will be somewhere you can get at it but lots of times it's under a BGA chip which itself is under a rf shield where only an ultra-sonic or reflow will get it.

>>1248873
Is chip reflowing a legit technique?

>>1248877
Of course, just use plenty of flux. Not a guaranteed fix by any stretch because the corrosion could have damaged the IC but the process will clean out under a chip.

>>1248868
Try battery water, then alcohol, then seal in a bag of silica catlitter for a few days. Worked for me.

>>1248868
Cover it in spray foam, all moisture and corrosion will be displaced as it offgasses.

>>1248880
>>1248901
>>1248904
Thanks, I appreciate the help!

hose it down with 99% proof rubbing alcohol. The alcohol will displace the water then evaporate.

Fuck you dumbshit nigger faggot gay.

>>1248909
By chip reflowing being a legit technique he meant with a hot air reflow station which costs a couple thousand dollars. You can't do it in an oven because everything on your phone would fall off/melt if you got it hot enough.

Watch louis rossman or rossman repair group on YouTube.

>>1248964
hot air guns are down to sub 100
thanks based chinks

>>1248971
That doesn't hold a bga chip in place and set it down on the right row of pads.

That doesn't reball the chip.

No

>>1248873
So, isopropyl alcohol worked! No reboots, stable performance, no overheating, the screen brightness is ok so is the touch. Wifi and phone signal work.
However there is a black vertical line on the right side of the phone and smudge-like discoloration on the bottom of the screen. The vertical line appeared as soon as the water damage occured. The smudges are new.

>>1249569
>Android
Post boipucci

>>1248901
what is battery water? and why is nobody using acetone? I thought acetone was standard fare for cleaning electronics.

>>1249569
Congrads. The line in the screen is a shorted or broken trace between the driver and panel. The discoloration looks like water damage to the screen itself but without the phone in hand who knows. You can try to dry out the phone more and see if it goes away but most phone screens have the driver built into the panel so replacing the screen should fix both remaining problems. Screens are cheap if ordered via eBoob from china. I'd consider doing that.

>>1249668
Battery water would be sulfuric acid which would eat the copper off a board and acetone would destroy different coating and layers of a PCB. Isopropyl alcohol is the correct tool for trying to get off corrosion. If you just want to wash a PCB use soapy water. Diluted dish soap works well.

>>1249703
Will do. Thanks!

Hi have a Toshiba Tablet that just now started showing watermarks (decreseased coloration) comming proportionally from around the edges. I can't take it apart as I don't know how, nor have the tools

can I use isopropil to submerge the tablet in it and let it dry on a box with rice?

or should I just get her somewhere to get fixed asap?

>>1248943
>99% proof
This is an 18+ website. Come see us again in six years or so.

>>1250154
>can't take it apart as I don't know how, nor have the tools
YouTube is your friend. Search for "#modelnumber# disassembly" and see where that takes you.

>>1250154
Absolutely not. Isopropyl alcohol is conductive and your tablet has a battery in it. Doing that would be worse than submerging it in water as the alcohol's vapor is flammable and shorting out the internal battery could very easily cause a fire. Also isopropyl alcohol isn't some magic liquid that fixes things by its touch. You have to use a cotton swab or tooth brush in combination with it to scrub away the corrosion.

>>1250161
If it doesn't have the small screws for electronic appliances, if would be clipped, and there are tools for that as well. Like I said I have none of the tools. I will remember your advice as well, thanks for that.

Luckily I just went to grab it and it had dissapeared. Never happened before but I wonder how long will it last.

>>1250212
Thanks, I must have misunderstood anon, I did however thought that letting it dry off for a week would have been enough. I panicked since it was my mother's tablet.

I did wonder as well why the basic circuit cleaner would not solve that, I tryed it why an old xbox that had gotten moisture many years ago and it didn't work, so I took the word of the anon on isopropil as fact, since it appeared to be backed up.

>>1248868
Wife dropped hers in the washer and I saved it. took it apart. Brushed it with anti static electronic repair brush and 91% over the counter alcohol. Let it dry a day or so. Reassembled and it's been good ever since. What should I buy with the $300 I saved? Thinking about cutting down my own tree. Could get that 300 up to $800.

>>1249703
The smudges and discoloration are gone. Weird but I didn't even need to dry the phone again.
>>1249569
Today,however, boot loops started again, but it's as if the power button was being pressed. They start every 4 hours or so. The first and third boot loop, the phone was in idle mode and started looping until it's battery died. The second time I was just browsing. I run AnTuTu, and had the phone play a 1080p movie for 2 hours and it didn't start looping, so I don't think it's a heat related issue when the cpu's running hot. I reset the rom yesterday so I don't think it's a software issue either. I think the button mechanism was either poorly placed after I reassembled it or the corrosion is still there. But there's no pattern to it.

Welcome to repair hell also known as an intermittent non-reproducible error. Since I can only go off what you tell me you could try desoldering the power button. Might be corrosion in its contacts. You can check android's logs to see if the phone powered down normally or crashed.

First dry out the phone more. The screen still had moisture in it. That tells me there's still moisture in the phone. Once they're sealed up that moisture just lingers in the case.

If you're rooted you can reboot into your recovery mode and just let it sit there over night. If the phone normally boot loops every 4 hours in the OS but it can make it a whole night idling in recovery I'd look for more corrosion probably around ram or the baseband (possibly wifi).

>>1251401
I completely missed the power button. From what I see, the contact point isn't actually soldered on the board. I rubbed it with alcohol and I'll leave it to dry over-night along with the rest of the phone under a lamp. I'll post results again tomorrow.

>>1251401
>>1251577
Nearly 48 hours later and it didn't boot loop. Well if that's out of the way I'll be looking to flash a newer android rom. Kitkat in a 2GB 8-core phone kinda bothers me.

>>1251115

Just FYI, the discoloration is liquid getting into the backlight's diffuser, which is a paper-thin matte material that makes the backlight a homogenous white instead of a bunch of white spots where the LEDs are. Most likely it just dried out.

>>1252456
Thank for the info. Honestly I didn't expect more water inside the device since it fell in the water about 40 days ago.

Isopropyl alcohol that shit. Nothing else, not fucking WD40, no nothing.