Blown Power Management Chip on 8227l Unit, maybe even fire hazard... - Android Head-Units

Today I was playing around with my newly purchased generic 8227L A10(fake) device, the flat ones with 9/10 inch touch buttons only.
And then device suddenly rebooted, a pop sound, screen went black and then a bit of smoke came out and smelled ... well like burned electronics smell.
Opened the device and found this (take a look at the chip in the center, if I encrypted the remains correctly that's a power management chip).
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When connecting to power, device starts smelling again, so chip will probably burn it's way through the board...
Edit: yep connected it back and it lit up like a orange led, didn't stop either, after 1/4 of the chip was burned my power supply cut of due to overcurrent. the boards main fuse never blew up...
Not sure what to make of it but I'll definitely change the wiring or add a hardware switch to my other Chinese Android Headunits so they are completely turned off when I leave the car.
Just wanted to share this info as, maybe it's just a one off kind of hardware flaw or maybe not and you just have to trigger your unit it in some way to blow it up.

Related

[Q] Screen permanently turned off while performing service for my G2.

Hello Guys.
I got some problem with my 3.5mm jack, so I decided to order a whole new tape with USB connector and 3.5mm jack port.
http://thumbs2.ebaystatic.com/d/l225/m/mRfGTPTIX7tNp0yCo0_JEmQ.jpg
Got the package with small toolkit to open phone and change this thing by myself.
I've followed instructions from one of many youtube DIY movies.
New parts got installed, everything went pretty well... then closed phone. Turned On... and here I em...
Power button doesnt work, I see no light around the power button, no screen reaction... But I hear that phone turned on because of LG logon sound. Phone reacts while pluged in to charger, USB->PC too.
Attached picture with exact conectors I plugged off while changing parts inside.
Why power button doesnt light up? Why doesnt work? Is there some small connector between power button and the board, because I dont see any, there is a Toshiba Chip just beneath the power button/volume part.
Please help me, give me some advices what exactly could get wrong.
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Thank You for any help.
Sorry in forward for my English...

[Q] Can you identify this part?

Opened up an old PC on a stick to see what I could do to improve wireless signal and ended up breaking off what appears to be a part of the wifi antenna however I have no idea what it is correctly called, a few google searches and I come up short. I want to know what the part is called so that hopefully I can find out how to reattach it.
The part looks like a gold color pin that pushes in, sort of like a micro plunger. When the case is put back together there is a metal plate on the case that makes contact with this pin to create an antenna of sorts.
I would just solder it back on but I can't make out any metal contact left to solder to on the spot where it broke off from.
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Howdy mate,
That's a surface mount pogo pin, Lson is a company that makes them, you could probably salvage one if you could find an old car kit or phone charger from the late 90's. You could also replace it with a piece of springy steel from a battery terminal but that might affect the antenna wavelength.
Tetsuo
Thank you!
That is exactly correct

Lines through screen but not damaged/illegible

My Tab A 9.7 has lines/flickering through about 75% of the screen (closest to the home button). The screen is still usable (though barely at times) and fully responsive to touch. I've seen some reports of a loose connection internally, but nobody seems to have the same issue as I do. Some pictures are below:
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Any idea if this is repairable/what the fix would be?
Hello
First of all, if you did drop it from a considerable hight it ma be a loose connector, if not, did you flash something and after that the screen started making this lines ?
Your best move will be checking your warranty, if it doesn't apply to your tab any more, try opening it and checking for any loose connectors, mainly the screen ribbon, before that try to look for a teardown instructions for the tab, sometimes they put the cables in places where it's easy to damage if you open the device without any knowledge of how to do it safely.
I had a similar problem on a samsung phone and in my case the screen was faulty, it shows flickering bright lines just like your tab. Replacing the screen fixed the issue.
Good luck
If you broke or dropped the device, then that might be the problem. If not, then it's probably because of the firmware.
If you have not broke or dropped the device, then go to Updato.com and press OS Updates and then type in your device model and it should take about 5 minutes or more to download.
Hope I helped.

Joying Sofia headunit not booting up but red led blinking [Send back to warranty]

Edit: Sent the unit back for repair.
Hi guys, so i had my car sitting for 2 month so i charged the battery. After that was done the car was working fine but the radio showd a message that it tryed to start 3 times os something like that and never booted again.
There is power consumption 0.4Ah as soon as the yellow wire is connected but nothing changes when i connect the red.
I can see a red led blinking on the coreboard, and i tested firmware upgrade with sd card and the consumption doubled to 0.8Ah.
Joying support after watching my video told me i didn't know how to conect a radio, told me to open the unit and later
to pay for a new screen and send mine after it works.
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I found a guy with the same screen model and my screen was ok after all.
So i have a problem with the mainboard or the coreboard.
Is the unit always on sleep because the red wire does not transmit the wake up signal or is the coreboard dead?
videos on youtube CrAzYDr1veR channel
Thanks :good:

Dasaita Max6 10.2 inch not responding to touch

Hi guys, I just bought and installed this and it took me the whole day. Sadly the unit's screen is not responding to touch. Has anyone experienced this? The buttons to the left don't work either-i would've at least expected those to be responsive.
Whats super weird is the unit does not load. It boots up instantly... Don't these things need load/start up time. It booted instantly as soon as I plugged it in... Thought it would've been a cold start.
I made some videos to help show the problem.
Appreciate any input. As you can see I tried the reset button which is responsive.
I should have mentioned I also tried unplugging and plugging to no resolve as well
You are not holding the pin in the hole for long enough to do a full reset. You have to push the pin in the hole and HOLD IT until the button lights flash, then let go. It takes about 6 to 10 seconds of holding the reset with the pin.
If that doesn't work then there is probably something wrong with the outer touch glass. Maybe it's not fully plugged into the board.
The capacitive glass has a small ribbon connector on it like in the picture. See if that connector is properly plugged in.
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