Hello everyone,
Currently i have a problem with my samsung tab A 8.0. Days ago i accidentally dropped my tab while it was being charged, resulting in red Cross with lightning icon while i tried to plug it on anything, and suddenly all of my usb otg were not detected and it was not detected on my pc...even usb debugging was not detected too...i had opened its case and checked the continuity of its micro usb port and it still seemed ok...now i have no idea about how to solve this, do you know what to do if something like this happens?? I suspect its pcb track is broken so maybe i will need a new motherboard again...
Hello, anyone?
How are you checking continuity? You would need to check it between the end of the USB cable and the solder points behind the micro USB pins. No point in testing to the actual pins.
The pins that solder to the board are extremely small and difficult to resolder, some sort of magnification is really required.
The way I do it is by using a solid conductor wire wrapped around the end of a decent soldering iron. Even then it's a difficult task and requires a steady hand.
Related
I'm starting to have real problems with my USB plug. At first it would drop charger plugs when it was on the wall, so I put it upside down. But now I can't connect to the PC all the time either. I have to jiggle the plug a bit or even breathe down in it (the moist makes the connection better). Has anybody else had that problem and fixed it in any way? I suppose the plug is soldered on in such a way that it has to go to a workshop, right?
i strongly suggest you to send it for repair or resolder the base of the connection(this is user servicable provided you have some soldering skills) so it doesnt wiggle. i'd probly even suggest to hotglue the plug but before you do so make sure the plug is sitted properly and it does sync
the same thing happened to me and with a bit of jiggle the plug broke off and now its permenently damaged(ie it will never sync via USB again) so far with self repair i only manage to make it charge
i got no idea how to reattach a 10pin mini USB plug to my board and some of the copper tracks looks damaged which means if i send it to the shops, its a $500 repair and a board swap
I bought a Nexus One with the infamous broken power button issue, and I am curious what would the effect be if I short the VCC and GND line in the charging port? Has anyone tried that? I am thinking that it will either fry the board or trick the phone to think that it is charging.
The reason I want to do this is because I travel a lot and I might not have access to USB charging if I want to swap the SIM card. I am familiar with the other tricks regarding remapping the trackball_center and I am going to install a version of CWM that doesn't support charging (that way the phone boots when I plug a charging cable).
So long story short... what do you think about attempting to short the micro USB charging/data port?
dcalpha said:
what do you think about attempting to short the micro USB charging/data port?
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Click to collapse
Not much.
Unless the unit is in USB host mode there will be no voltage on the Vcc line.
Even in USB host mode it should be current limited and do no damage.
Still, I wouldn't do it.
I don't know why you think that shorting it will do something useful.
Renate NST said:
Not much.
Unless the unit is in USB host mode there will be no voltage on the Vcc line.
Even in USB host mode it should be current limited and do no damage.
Still, I wouldn't do it.
I don't know why you think that shorting it will do something useful.
Click to expand...
Click to collapse
I actually do not know, thus I asked... just trying to think outside the box about a way to trick the phone to think it is charging short of carrying a portable battery charger with me (which can be problematic on carry-on luggage).
Another idea I am thinking about is building a small flex cable using a conductive ink pen that permanently connect to the phone's battery on one side and a cut down male micro-usb on the other side (to slim it down). Such cable would be small enough to fold under the battery cover and allow it to close.
My question is: Will the ~3.7v be enough to get the phone to start charging? and do you foresee any issues with feeding power from the battery right back into the phone's charge port?
dcalpha said:
Another idea I am thinking about is building a small flex cable using a conductive ink pen that permanently connect to the phone's battery on one side and a cut down male micro-usb on the other side (to slim it down). Such cable would be small enough to fold under the battery cover and allow it to close.
My question is: Will the ~3.7v be enough to get the phone to start charging? and do you foresee any issues with feeding power from the battery right back into the phone's charge port?
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Click to collapse
I think 3.7 won't be enough. Coz usb giving ~5V. So phone won't charge at smaller voltage.
Hi, I have a micro usb cord that I have been using a long time, but just recently it wont charge my device unless I push it down. Im pretty sure that the pins in the male side arent making contact. Other cords work fine. I was wondering if I could somehow bend the pins up in order to make contact.
Usb port sounds faulty on this legacy device. Cut an extra USB cable. Solder or connect internally +/- points to the magnetic points on the side. Been running it on both mine and my wife's device ever since broke our USB port spoilt. Battery and charging is still good till today.
Hi,
I recently bought a Blackberry Priv whose touch wasn't working and it had a black spot with a vertical and horizontal red and green line lit up ...
I wanted to access the phone through a OTG, i was able to briefly get the mouse cursor, but turned out the OTG had a loose contact, and the cursor wouldn't show up anymore, so i ripped my OTG cable and set out to rebuild it as a DIY project ... after much trial and error i think i was able to successfully build one.
I connected my DIY OTG and the cursor was back on the screen, however when i tried to operate it on the screen it left a trail of pixels when swiped on the screen ... scared thinking i may have damaged the screen i immediately rebooted the phone ... on reboot the trial of pixels weren't there anymore ... THIS WAS PROBABLY MY WARNING ... HAD I HEEDED ... i wouldn't be here writing this thread ... but i guess whats meant to be will happen anyways.
The mistake is that i wanted to check the voltage on the OTG cable when it was connected to the device ... i took a multimeter and touched the Ground and Vcc points on the OTG USB side to get a voltage reading ... poof the PRIV went DAAAAAAAARK ... aka ... DEAD ???
i don't know ...
Is that the end of my device ?
is there any safeguard build in android phones at the micro USB charging port end, something like a fuse(an IC, transistor, some component that will bear the brunt of a faulty charging wire/data cable) that will protect the sensitive and critical parts of the device ?
If i have to proceed the hard way ... is there a circuit diagram available for Blackberry Priv so that i can track back the components which might have been fried as a result of the STUNT (of touching Vcc & GND on the OTG cable) i pulled ?
:crying::crying::crying:
hey.
i have oneplus 5 its rooted and twrp installed
i erased syetem
now i can't install any system
my pc doesn't recognize it
i enterd Qualcomm mod but it doesnt recognize it
i tried to plug a usb drive it doesnt read it
i replaced the connector and usb flex it still doesn't read it
please help me
Is there any way to copy system to twrp without usb ???
thank you
hamzah93 said:
hey.
i have oneplus 5 its rooted and twrp installed
i erased syetem
now i can't install any system
my pc doesn't recognize it
i enterd Qualcomm mod but it doesnt recognize it
i tried to plug a usb drive it doesnt read it
i replaced the connector and usb flex it still doesn't read it
please help me
thank you
Click to expand...
Click to collapse
try with both side (turn cabel)
try to oush it in hard know it sounds stupid
i know it sounds stupid but i have 1 o+5 and i changed also everything allready and tryd bunch of cabels/chargers (all oem) and same **** , charge works only in 1 position too, dashcharge is just luck sometimes works sometimes not
something dies on the mainboard on that circuit
after flexchange now contactfail but still only 1 side active even that the phone recognize connection
I changed the usb flex and connector on mainboard
It charge but no data transfer
help
Help
Help
Might be hardware. The USB board is not soldered but connected to the manboard. Open the case and fixate. HTH
Help
does the dashcharge take some wiggling to activate? @hamzah93 @KaszasM it basically means there is lots of lint in the USB-C port. USB C is known for that. Use toothpick with the sharp edge to rub inside the USB-C port to remove the lint. keep going at it for sometime as the lint is really stubborn. i had to use a safety pin and rub constantly for 2-3 minutes to get the lint out. however using metal is not suggested until you know what you're doing.
Cheers
nikk95 said:
does the dashcharge take some wiggling to activate? @[email protected] it basically means there is lots of lint in the USB-C port. USB C is known for that. Use toothpick with the sharp edge to rub inside the USB-C port to remove the lint. keep going at it for sometime as the lint is really stubborn. i had to use a safety pin and rub constantly for 2-3 minutes to get the lint out. however using metal is not suggested until you know what you're doing.
Cheers
Click to expand...
Click to collapse
most of the times its just the connector , i changed a few already ,
maybe he didn't placed well by the change or it's already **** product.
you must push all the way down once i even needed to polish the edge of the usb too, that it matches into the backcover.
in my case as i made from my phone in a hot moment a 1 + "fold" a needed to change beside the battery display backcover, even the smd connector on the board .
but all if them is still fine even the last wich i mentioned in the first post above , now with the new smd ?
take your phone to pieces and free the usb port and try your charger / even better any usb otg.
if it works the trouble is 100% that u must push "down" in the backcover let the red isolation ring dissaper in the cover , if not worked with "free" usbport order 1 more
I changed the connector many times
I ordered one more flex cable and dashboard
I will chang it will replay
Thank u
i had the same issue. i just cleaned the charging port with some water ( i took the risk as it is splash proof) and a cloth and its even dash charging now. But do it at your own risk. i do this often when the problem occurs again.